Hey, Renee! It's always nice to see a fellow Jersey Girl - thanks for your question.
Prior to my gastric bypass surgery several years ago, I was in this size range. There are no rides with a weight restriction, and at that size, I never had any difficulty on any of the Walt Disney World attractions.
I do want to say that from talking to other Pooh sized people, it's more about how your weight is distributed on some attractions. I know many plus sized people that have no trouble on attractions such as Seven Dwarfs Mine Train, however, my husband has really long legs, and despite his weight, his legs were too long to fit.
There are some fabulous attractions where size is really no issue at all. The brand new
Na'vi River Journey at
Disney's Animal Kingdom is a visually stunning attraction with a bench seat on a boat, like Pirates of the Caribbean and It's a Small World. Guests of any size will be comfortable in those seats.
You will also find some attractions, such as
Big Thunder Mountain Railroad, have pull down lap bars. You pull back as far as is comfortable for your size. The only recommendation I want to make here is that it's better for the plus sized person to ride alone, so they have the extra space, but also not with someone considerable smaller. The smaller person would have different requirements in terms of pulling back the lap bar.
Some attractions have test seats out front, so take advantage of them to make sure everyone is comfortable.
I hope your whole traveling party has an amazing, stress-free vacation.