I'm rather large (as Robin will attest) and I can fit into the rides OK. How large is large? I think in the coasters, if your chest is over 55 inches, then you may not be able to ride. Sometimes I see very large people get into rides. It took some effort from the ride attendant to get them in, but they got in. There are test seats outside each coaster to see if you can fit. Also ask any ride attendant to see if there are size issues.