We couldn't get a reservation for our group of 28 the day before, and I think it works out better and less stressful. We are doing our welcome/rehearsal dinner two nights before. There is no rehearsal, so it's basically just a big group dinner and hopefully the younger people will arrange a trip into Cancun for that night. We are planning on doing the Isla Mujeres trip the day before our wedding, just to keep my mind off the whole planning thing and force me to relax.
I am having my hair and makeup done starting at 11:00, bridesmaid and mothers start at noon. Our WC suggested that everyone be ready to go at 2:30, so this way we will have time for some pre-ceremony getting ready pictures.
Our ceremony is planned for 3 pm, cocktail hour immediately following until 5 pm, dinner starts at 6:30 pm so that we can take some pictures in between and our guests can either freshen up or take a quick nap.