OP, I am almost the same size and weight but 62 hips/lower belly. I can ride everything I have tried. But haven't tried Kali Rapids cause I heard I wouldn't fit or Sum of all thrill cause I know I won't fit. But I haven't had problems with anything. Seatbelt all the way out first before sitting and if it's a theater seat sit on edge and slide back. Also watch your knees on Dinosaur, I knocked the fool out of one of mine getting in.
I don't know if it was mentioned but getting up from the go carts was rather embarrassing too, I had to crawl over and up and literally crawled on hands and knees out. I asked my niece "did anyone see that???" And she looked at the few hundred people around and said "nope, not anyone you will see again."