Kings Island in Cincinnati, Ohio?

I'm a big girl (around 300 lbs) and I'm going to Kings Island with some friends soon. Last year when I went, I had a hard time fitting in some of the rides (Diamondback, The Crypt, Drop Zone) but I was fine in others (The Vortex, Invertigo, The Italian Job). I'm wondering which rides have bigger seats and which I should stay away from. I don't want to be embarrassed again. Thanks in advance!