We just returned from Ft. Wilderness, and no, there is no height requirement. Just must be feet-first and one at a time. Saw quite a few little ones not wanting to go down alone, but it's safer than two. Occasionally, there'd be a lot of people waiting at the exit to the slide in the water, just waiting for someone's foot to connect with their jaw (never got the chance to demonstrate and provide a lesson, darn it! ;-).

Depth of the pool is about 3 to 3.7 feet, depending on where you are and which sign you read. Even the signs for the slide differ (sign may have been brought from River Country as well). The current from the slide drives you across the pool, pretty much, so you have to work at staying there. I think we went down about thirty or forty times each, each visit to the pool. More crowded in the early afternoon, less in the late afternoon and morning.

Be a very good lookout, and you can score one of the umbrella tables. At the right time, all it takes is some walking around with a towel, a hat and sunglasses when you spy what may be people packing up. I was lucky our last two "camp" days.