ok, I am in the industry, and do the actual waxing.....first off, make sure that the person doing it has experience. I'm sure that the first person I ever waxed has never had it done again! Maybe for the first time you don't want to have a brazilian, just go for a "regular" or a "french". When is the last time you shaved? If it has been recently, like in the last 2 weeks, you will have growth soon after the wax. What grows in is NOT the hair that has been waxed, but the hair that is not yet through when you wax. All hair grows at different times, so there is some that is not broked through the skin at the time of the wax.
If the person doing the wax knows what they are doing you should be able to go the day before your vacation.
I could go on and on, if you would like to contact me personally, please do so and I will be happy to talk to you.
good luck,
M.