Adventure World in suburban Washington DC (Largo, MD)
A ride called the Rainbow featured slides of different colors and heights. “About 2/3 of the way up the narrow stair, a sign was posted with a weight limit. By the time one is in a position to see the sign, one has already climbed a large part of the way up, and the people in line behind one have also ascended, blocking the stairway. There is no escape stair. I didn’t want to inconvenience all the people in line behind me — and I wanted to ride the big slide. So I said to my husband “I’m sure it will be fine” and continued up. There had to be some leeway in the weight limit, right? I mean, lots of men don’t even know their weight… Anyway, you’ll be happy to hear that the slide didn’t break under my weight - no one was injured or even embarrassed. BUT my weight meant that I got quite a great deal of MOMENTUM going on the way down the slide. It would have been much better, more responsible policy to post the weight restrictions at the entrance to the ride itself. The park has been renovated and expanded since our visit - the rainbow slide may not even be there any more. But I did learn that weight limits are posted for a reason.”

Busch Gardens in Williamsburg, VA
Of the three coasters, Big Bad Wolf is probably the roomiest, followed by the Loch Ness Monster, and then the Drachen Fire. The Drachen Fire is not very friendly to people over 5′6″ tall. The Alpengeist has a maximum girth of 48″; the Apollo’s Chariot has a maximum girth of 52″. They have a sample car sitting at the entrance of the Alpengeist so that you can see if you will fit before you get into line. The operators are helpful and do not rush you.

Six Flags Over Georgia-Austell GA (Atlanta Suburb)
A size 28W-30W woman had problems fitting in the safety devices of some rides, but always fit and was able to ride without too much discomfort

Paramount’s Carowinds-Charlotte NC
A size 28W-30W woman had problems fitting in the safety devices of some rides, but always fit and was able to ride without too much discomfort.

Disneyworld in FL
A size 28-30W woman fit on all the rides without any problem. One 28-30W person found the inner tube rides (other than the Lazy River) a bit difficult — the inner tube kept sinking down into the water, and she found herself scraping the bottom a lot — she still found it fun. They have scuba jackets for the Shark Reef in sizes up to 28-30W. Star Tours and Body Wars were a little snug. Clothes in gift shops go up to size 4X.
One poster reported that at 6′7″ and 400 lbs, height was more of a problem than weight and recommended the second row of most rides as having more leg room. “On the water rides be sure to seat in the middle (left and right), we had a boat full of couples all seating on one side, and started to fill with water.