I've done this so many times I've lost count so here is a bit of fair warning. If you are the least bit popular and the group you are traveling with likes to be social, your evenings will not be yours to spend alone. As a rule when traveling with a group, the tendency is to party a bit and explore the town in the evenings and you will be generally expected to be a part of it. You might be able to take one night off claiming to be too tired or some other plausible excuse - just don't figure on being Shawna every evening because people do talk and someone is sure to make it their mission to find out what it is you are really up to. I pretty much reserve taking Rachel along for those business trips that are pretty much solo as I've found group trips just aren't worth the effort. Having said that, there is certainly nothing wrong with bringing some lingerie and nighties to sleep in.