Paper copy of hotel reservation confirmation in your purse. We always do this because you never know....it came in handy once in Lake George where our reservation was screwed up, things happen. It's always good to have the paper. I don't rely on phone email for this either because with my luck, my phone would be dead when we walked up to check in.
Small first aid kit, Allergy meds, pepto any prescription creams that you don't normally use but may (I bring everything and we usually wind up using it all) Glide or lotrimin spray if you have an issue w/thigh rub, ICY hot, special shampoo (especially w/ so much chemical in the pools, I bring It's A 10 shampoo to keep our hair manageable) entertainment for kid(s) --we drive so I always make sure my DD has pillow, blanket, dvd player/earbuds, movies, books and Nintendo DS. Sometimes she brings some coloring supplies. WIPES(both baby wipes for car / parks and toilet wipes), napkins, sanitizer. Backpack, soft side cooler with ice packs--case of water, plastic garbage bags for wet clothes and garbage while in car. Extra bags for souveniors, Pedicure supplies in case I need to touch up toes. It's a lot but as long as I remember all these things, everyone's happy ☺