Ok, so having just been to the park, I wanted to give an update in case others are looking for answers. Georgia Scorcher...lacked about an inch to buckle. My friend carries her weight in her lower body and was able to ride. Dare Devil...felt like the restraint was going to crush my ribs and/or pop up any minute when attendant got the thing locked, so I wimped out. Friend also unable to ride. Neither of us fit in the test seat for Superman, but I wish I had my phone with me to video ourselves as we tried for ten minutes to squeeze ourselves into it while the kids went ahead to enjoy. I had no intention of riding because the flying aspect freaks me out, but friend was bummed she could not fit.
I enjoyed Thunder River, Splash Water Falls, and the Monster Mansion, but no roller coasters unless you count the Mine Train We did not have the time or inclination to test anything else, so I cannot attest to the fit of other coasters, but I would guess I need to lose at least forty pounds before I go back if I plan on them.