What happens in Vegas stays in Vegas . . . unless it's all over Facebook. Steer clear of any 2 a.m. Instagram snaps that you might regret in the morning, and chat with the group about what is or isn't appropriate to share on the Internet. If you want to share some funny shots with the girls but not with the bachelorette's soon-to-be mother-in-law, ask the guests to email you their photos, then send out a CD of all the compiled pictures.