
We always bring a tote bag with us to the water parks. I bring towels, sunscreen, goggles and a change of clothes in the tote. (We usually spend most of the day at Typhoon Lagoon) We wear our water shoes/water sandels there and back and while we are at the parks. I normally just claim a lounge chair and put the tote bag and all our stuff there. As for our room keys/money/credit card, I wear a water wallet on a neck cord/lanyard. You can get these at a lot of different places. (I bought an inexpensive one at Kmart, but it leaked...not a real problem, but had some cash that was wet for a while...then I got a really good one from REI...everything stays very dry in it...although I don't bring cash with me anymore

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They do have lockers to rent. My guess is that you would not be allowed to wear the fanny pack on the slides, as I know that they say some buckles/rivets and things on bathing suites are not allowed on the slides, but I don't know if this is enforced.
AS for goggles or sunglasses, I would vote for goggles...especially if you are going to the wave pool in Typhoon Lagoon...those waves are STRONG!
Have fun...BTW, our we LOVE Typhoon Lagoon, but we will give Bizzard Beach a try this summer too!
Lynn