For the most part . . .
We just ordered one of these for our upcoming trip.....it will make our regular camera sufficiently water-proof for the waterparks and DC (we bought an inexpensive waterproof camera for our trip over New Years, but the photo quality was nothing to write home about):
http://www.dicapacusa.com/
Cost was under $40 for the case plus an accessory kit (tripod, etc.).