I have never done that, so the following is a purely theoretical/speculative observation:

What makes sugar dating special, exciting and rewarding is that the dates are all (or should be) pure fun. A break from reality, with just sex, maybe nice meals, maybe events. But none of the drudge you go through day-to-day with a regular live in SO or girlfriend. No washing up, no messy bathroom events, no putting up with their "regular" day-to-day selves (and vice versa). Many SBs are great for a roll in the hay, but can't keep up a sustained conversation for even a few hours, let alone a week.  

So, seems to me that spending a week with an SB risks changing the nature of the arrangement.

... but I'll distill it all down to this:

 
1. Keep your plans flexible and have multiple back-ups/options ready.  
2. Plan options for a fair amount of apart time, at least 2-6 hours per day (or more - ask her), where she can get the fuck away from you.  Fund that time as well so she can do something that interests her - even if what interests her is not being with you for a while.  Be gracious and accepting when she wants to spend alone time.  (I don't know you and I'm already tired of talking to you. LOL.)  
3. Discuss key rules upfront:  
a. Who is paying for what (Hint: You are paying for everything).  
b. She can veto any plan anytime
c. She can bail any time and go home at your expense.  
d. Sex happens when you are both into it. It's never an obligation for her as your "payment" for taking her on the trip.
4. Finally, ask her to ensure she brings her own cash and cards only to be used in case of emergency. She should never be helpless / dependent on you because shit can happen (accidents, health, crime, drama, labor strikes, natural disaster, etc.).  

 
Life is good

 
The Cat

I've just had two short vacays with SBs both both had a share of drama and the unexpected.
Especially if you haven't done overnights, you're going to be seeing all her quriks and odd habits (and she will see yours). Is she spending an hour putting on makeup? On social media or chatting with friends at 4 am? Hunting for snack foods just before dinner? Maybe she's too hung over or grumpy for morning sex? Sleeping habits may not align. Of course there could be a bunch of monetary/shopping things that you didn't plan for.  
I don't think you can plan or discuss all these things in advance but it's best to do this with someone you know well and have spent time with before.

Personally I think vacations with an SB would burst the bubble of fantasy I have with my SB's. I value my personal time and have a busy professional and home life, so I'd not be able to do vacations anyway but if I could it would be torture. I love sharing intimate time together romantically but any more than a few hours at a time would be too much. To each their own, of course. Some SB's and SD's love the vacation dynamic and spending long hours together and in some cases it strengthens the relationship. In other cases, it can lead to drama and destroy the delicate balance these relationships often walk. Too much of good thing can be a bad thing!  

After being in an arrangement for about 1 year I took my SB to Coachella. So a 4 day experience. Everything went perfectly. No drama, she was her usual pleasant and caring self. Enough sex and we chatted away like best friends on the drive and during the event. There was no time away from each other however she takes 2+ hours to get ready so I was at the pool while she did that. I guess you could say that was our alone time. I'm thinking of taking her to New York City next. On the other hand it was such a precious experience maybe it could only get worse with more trips.