I would prob have to air on the side of caution an get one off before the big production! Last thing you want is to pop off early!

If this is your first time having sex in front of someone else, or being videoed, or with this particular provider, there is every chance that you could suffer from what is commonly referred to as "performance anxiety".  There is a greater chance of not being able to get an erection than there is of going off too soon if that happens.

I don't know if you remember this from about a year back but there was some dude who was going around publicizing the fact that he was going to do a reverse gang-bang and film it all and make lots of money.  He had a dozen or so women lined up and was talking about more showing up for the event.  When the day came, he couldn't perform.  Instead of having a reverse gang-bang, he had a total flop.  Pun intended.

It's not easy to perform on camera, nor is it easy to perform when other people are watching.  It may look easy when you watch porno films but it's not.  Although there are 100s of girls filming porn, there are 100s more who did one or two films and quit because they couldn't deal with it.  And the reason there are so few guys in porn is because it's very, very difficult to perform on cue...

It's not as easy as it sounds.

My advice would be to practice sex in front of a camera with a girlfriend, or other escorts (although there are few that allow filming) before the big day so you get used to it.  And, if you can arrange it, have sex in front of other people - swinger party, dogging, or something so you get used to the idea of being watched while having sex.  I would even suggest seeing this provider without the camera and cameraman once beforehand just to make sure you're comfortable with her and there's no personality conflicts or anything else in the way.  

The more comfortable you are and the more relaxed you are on the big day, the better you'll perform.  And you won't worry so much about bursting too soon, or being able to perform or anything else.  The key word is RELAX.

Since you are paying for everything you are in control, and since you are in control anxiety shouldn't be an issue.  Assuming that you are filming in your home, just have the first pop with the PS in the privacy of your bedroom.  You'll have the chance to build up the chemistry and for the two of you to learn what make you tick, sexually.  Not to mention, that the second pop will take longer.  The cameraman is on your time, so have him wait in the living room or something.

Shooting to early - not popping for a month has the same effect as not popping for a week. You might be a bit more eager, but the size of your load will be the same.  Otherwise, you would have grown kingkong balls by now.

Disregard the cameraman and don't even look at him. just look at what your girls is doing, and the early private session is so she can learn what you like to be aroused.  

If there's an issue with the camera person being a guy, get a camerawoman.  Maybe she'll get wet and horny from watching and you'll get lucky and have a menage-a-trois

If a  guy can keep it hard and cum several tmes, the better. Cream pie facial, tits, Ect. Just keep coming over n over.

I've read that saving up for more than two or three days won't increase the size of the load, and I believe it.

Just Curious, how much will this adventure set you back?  May have to look into it myself....

Relax, Don't Over Think It and Let The Experience Happen!

I've done a few of the things you're considering (one of the more interesting was actually being the cameraman for Alexandria Quinn once), been with a number of pretty-well known girls and have had a number of experiences along these lines in the last three years or so.  

These things have become my mantra: let the experience unfold as it will, let it come to you, as much as possible, and stay in the moment!  Obviously, it would be next to impossible to not have some pretty high expectations when setting something up like this but I've found that the less I focus on those, in particular the real specific ones, the better the experience tends to be.  The best time was the first time I got together with Alexandria and Nikita Denise.  I had some pretty clear ideas about what I thought should be occurring and when I share one of these early on, I was told "Ve know vhat we're doing, darhling!"  Right, right, you are trained professionals!  The point is, she was right!  From that point forward, I just quit thinking about what I thought SHOULD happen, went with what they suggested and it ended up being the best sexual experience I've ever had.  

Of course, that was with two VERY experienced women who also really liked each other.  You don't mention who your intended paramour is but if she is indeed, "high ended," she too is probably well seasoned so the same analysis may obtain.  

As for as the relief ahead of time, it's been my experience that if I hold off for a couple of days before, things are as intense as they're going to get.  Anything longer doesn't seem to make that much difference here.  You know your own physiology as well as anyone, trust your gut on that one.

Turning to the early pop, are MSOG going to be on the menu?  If so, that may be the best way to go.  Had a great night a couple of years ago with Debi Diamond and Tammi Ann where I shot pretty early in the event but then sat back, recharged the batteries, spent some time getting to know the girls and then getting at it a bit later.  

I've used a camera myself on a number of occasions but have never had a third party operating the camera.  My thoughts would be to get someone I was comfortable with and I guess soon you'll forget that they're there!  This also may be something you might want to try with someone else before hand.

The bottom line: as much as possible, relax and stay in the moment as much as possible.  Doing this has allowed me to have some images seared into consciousness that's as good as any video I've made!  I don't have it on film, but the sight of Alexandria on all fours taking me to the root while Nikita knelt behind her and buried her tongue in her ass is one for the ages!  Good luck and let us know how it went!