We split up the night before the wedding. The girls and I had a "slumber party" (we rented 2 connecting rooms at the GF) and the guys hung out for a little while at Pleasure Island (because the groomsmen wanted to, not my DH, but he went along for a little while). Then the morning of the wedding the guys went to Disney Quest while I had a breakfast with my parents. It really worked well, but I only advise doing something the night before the wedding if both the guys and girls are willing to let the bride and groom get some sleep. Neither of us wanted to get zero sleep, and our friends let us sleep all we could (with a little help from Tylenol PM, LOL). We actually had a tea at the GF as our bridesmaids luncheon, and it was wonderful.