Our family has made many trips to Disney World. Think light (you'll be carrying it around for hours on end) easy to clean and waterproof! I haven't wrecked any bags there yet, but I don't carry anything expensive to the parks just so I don't worry about it.
I'm getting ready to go again, and I'm taking two bags with me this time. I have a small
leather Longchamp crossbody bag. It's very lightweight, and it holds a surprising amount. I'll carry this in the airport, to dinner, when I don't have my camera and when it's not raining - expect it to rain a lot, it's FL. You could use your
Gucci disco like this.
I just ordered a nylon
Baggallini Everywhere Bag to carry my camera, water bottle, rain gear, ect. I can't wait to see it in person, it seems like a handy travel bag. If I didn't bring a DSLR camera, I'd probably carry an even smaller nylon crossbody.
In the cooler months I've also carried a
nylon backpack by Bric that fits the bill, but I think it will be too hot in the summer to carry things on your back.
Have fun!