Yes! Exactly my situation! We went in September and I was 315. The GOOD news - you should fit on virtually every Disney ride. They are all built pretty generously. I can give you specific feedback on specific attractions, if you like! (talking about Disney is my absolute favourite thing in the world, LOL). The bad news is that if you are planning to go to Universal or SeaWorld there are a lot more things that won't work out :-( Also, I completely wrecked my feet - I was so blistered and in pain that it did really spoil my trip to an extent - which is why I finally got it together to start dieting (although it took me until February). But as I say - ask ANYTHING because I've been to Disney enough to know lots, and have that 300 pound perspective. ps - assuming you are female and similar height to me - Im 5'5 or so, but if you are male or much taller you will have quite a different shape from me ;-)