Wanted to inform people of my situation at Disneyland this weekend during my five year wedding anniversary celebration. To start, I am 470lbs (down from 550lbs last year.) and 5'8". I carry most of my weight in my torso, particularly around my belly. (Super pear shaped.) I have a long torso and very short legs. With that being said, I has no problems with most of the rides!! I rode everything but the Matterhorn and Space Mountain. Nor did I ride the teacups, anything in toontown, or rides geared towards the littlest of children. This go around I went did not go on big thunder as it was closed, but I did go on it last year. I only had two issues. 1. The Jungle Cruise. The line corrals are very thin and there's a turnstile that I had to sorta hop over (got my leg stuck for a second.). I would recommend seeing if you could get in through the disabled's entrance. 2. Leg room. Even with my short, short legs, they were still a bit cramped on most rides. Not enough to not enjoy the rides, but enough to tire my legs out quicker than normal. I work retail and I'm on my feet for the better part of 9hours a day, 5 days a week, so walking wasn't an issue, but if you don't have the ability to go-go-go for a couple hours at a time, there are plenty of places to park your bum. Also, utilize that time by going on the train or monorail to get where you want to be while sitting down. Just some info and pro-tips. I hope this helps you make the decision to go, if you've always wanted, but thought you couldn't!!

Just wanted to second this. Disneyland and Walt Disney World are very size-friendly vacation destinations. At 5'10" and up to 370 lbs, the only issues I've ever had with fitting on anything was leg room on the Winnie-The-Pooh ride at Disneyland. It can take some agility to get in and out of some ride vehicles, but almost all rides can be stopped or slowed and wheelchair and ECV accessible vehicles are available on a lot of rides as well.

Cast Members are happy to show you to alternate entrances if turnstiles are an issue (they've been removed from a lot of rides too) and are sensitive and discreet about handling it. There are belt extenders available on rides like Dumbo and The California Zephyr, and while some of the old theater seats are tight, newer attractions were built with wider seats or bench seating for barrier-free access.

The Disney parks really are the gold standard in accessibility for theme parks. There's a very helpful website about this too called WDW At Large: http://allears.net/tp/ridsiz.htm