If I'm packing light (as in, that is the only glass I'm taking that day) I used tarry my Nikon 24-120mm VR. Not very wide on a DX body (36mm), but I never felt limited by it on the wide end. I was usually in the 50mm+ range and if I needed wide, I always felt I wanted really wide.
That said, I picked up a Tamron 18-270 VR PZD this past Christmas, which will become my replacement walk around glass. It's perfectly sharp for Disney use and encompasses a huge range and it does so quite well. It's a little slow (ok, a lot slow) at the long end, but I don't anticipate using the long end in the evening where the speed matters.
I will note however, when I go down, I'm down there for a week, minimum, which gives me the change to visit most of the parks for 2 days each. I plan on what gear I'm taking on those days accordingly. IE, 1 day I'll take most of my gear and glass and that day becomes more of a relaxing, walk around a shoot kind of day, where I'm not trying to cram all of the rides, etc in. The other day I go light with just a single piece of glass (and usually a speedlite in my pocket for fill), that becomes our more "active" day.
PS - I voted "other" since there wasn't a "super zoom" range in the mix.