This is a small subject, but it's something that has always played a factor in having appointments. When determining how long it will take for me to get to the incall , I frequently give myself too much time getting there. I end up getting to the incall location (Hotel) 10 minutes before the actual set start time.  

I guess it makes a difference if I had my own place like I used to in Greensboro, I would greet my dates at the door fresh out of the shower and in my "Birthday Suit" Yet, if I am having to drive to a location for an in-call which I really do not do that much...........It may take time for me to check in. And I have no control over that.

Ohhh, I so wish I would be met at an in-call by a provider in their Birthday suit.... SCHWANG!!!! But most in-calls I have been to have been hotels, so it's usually woman behind door in something more modest than a birthday suit.

I have no problem sitting in a hotel parking lot for 5 minutes, pretending to be on a phone call or even answering email/texts... Of course I always have a book on my iphone to read. But, yes, my peeve is receiving a text while I'm driving the location saying "Can we make it 30 minutes later, I'm running late?"...

... drive around a little more or if they are not there yet but realize they are going to be early they make a stop to get something like snacks for us or something (even though I usually have some). I've had guys show up like 15mins early expecting me to just like come on up....15mins can be a huge deal if she's still getting ready and you don't want to get your provider all frazzled trying to hurry up. Trust I don't like the idea of someone sitting parked and waiting to come up either.    

That's exactly what I try to shoot for. It can take up to 5 minutes for me to get to the room from the car. The 5 minute window is perfect because you can't just rush into the hotel room. Doing that would raise some eyebrows from the staff and other guests. The elevators can also be a bit time consuming if the provider isn't on the first floor. It can take almost a minute to get up to the floor that the room is on. Factoring into to that is what floor the room is on, whether you have other guests riding up with you/stopping on other floors on the way up, and of course how fast you're going (sounds stupid but not all hotel elevators are the same).  
Then comes the walk from the elevator to the room. One situation I've faced before is having other people getting off on the same floor. If this situation ever comes up, I usually give them a good 20 second head start before I step into the hallway from the area where the elevators are. Once I hit the hall way, I slowly make my way towards the room, keeping an eye out for other people popping out of their rooms and the cleaning crew. Once I get to the door, I do a quick 2-3 quick knocks while keeping an eye out on the hallway . If it ever comes up, I usually pull out my phone and pretend I'm texting until they are a good distance away. Once the door opens, I slide right in and softly shut the door.  And then the fun begins. I'm not too fond of girls staying on the first floor. You're more exposed because there is slightly more traffic around than the other floors.  
This is Just the routine I go with. Other guys may take a different approach, but I've always felt well going like this.

Every hotel has a restroom off the lobby: use it!  Take a seat and text away, keep pants on if worried.

I have had a provider make me wait.  Had one to make me wait as much as 15 minutes before she provided me her room number.  Nothing like sitting in a hotel parking lot in 90 degree plus temperature waiting.  My truck a/c was broke and I finally broke down and waited in the lobby.  Needless to say, I requested to take a shower before the fun began

You do have some valid points. Although I wouldn't be so sure about lingering around the lobby and engaging in a conversation with the front desk. I feel a bit exposed whenever I go thru the lobby and I avoid to attract attention. I wouldn't want to strike up a convo with the front desk either. They could easily become inquisitive on why you're there. And for all you know after you end the convo to head up to the room, they could easily check the camera's to see where you're going. I do fake a phone call and a text message whenever I walk through and it works, but I still keep an eye out for those suspicious of my presence. I may sound paranoid, but the truth is that the less exposed you are the better.

Birthday suit...........Yes that was perfect for me because I did not have to think. I would get up in the morning, hop in the shower, I would leave the door unlocked just so no one would have to wait, and much to my surprise, I would be greeted with a warm welcome. Wet hair, no makeup, and a heated morning wake up call...........Gosh, Location, location, location.  

I time my "pre-play" shower so I'm out and dressed within the hour of starting, but there is nothing wrong with just coming out of the shower. I'd prefer that to the alternative.