It should be pretty easy to eat good no matter where you go, unless you go to some Italian places. I wouldn't cheat if I were you, a little cheat may bring back all of your cravings and you don't wanna go through that withdrawal again, do you?
When you go to a restaraunt and order something different (without bread, no tortilla or veggies instead of fries) they dont treat me any different than everyone else at the table. What is the difference between me not eating carbs and someone else being alergic to bread, they dont know the difference and will accomidate you. The advice for a cheat that I read in the book was that if you cheat, don't turn it into a day or weekend and keep portion control in mind. Good luck and have fun with your visit.