For our 8/17 trip to DC, here's what I have planned to bring: *credit card?? (I've already paid in full; do I still need to bring it?) *change of clothes for everyone, including socks and shoes *my prescription sunglasses and sunglass strap *2 waterproof cameras *waterproof fanny pack (needed?) *directions We plan to arrive at 8:30am with swim suits, cover-ups and water shoes on. All you veterans, have I thought of everything? I don't need towels, right? Do they provide beach chairs? Should I bring a book to read or is there no time? And I've read they provide the sunscreen. Thanks for all the advice!!