I went today and here are some things I noticed while riding with two of my friends. (one in which is 6'3 ft and 260 pounds and the other 6 ft and 290-300 pounds)
Diamondback: My friend who was 6'3 and 260 pounds had no problem getting on but my other friend who is 290 lbs. was asked to get off. They usually listen and push for three clicks but could only get two.
Vortex: If you are taller than 6ft and/or have larger thighs, I recommend sitting in the front of your cart. When you get on there is 4 seats, two in front, two in back. The front has a lot more room.
Mystic Timbers: Same as Diamondback. If you're above 290, you might not be able to go onto it. My friend who is 260 lbs was able to ride.
White River Canyon: I am 150 pounds and was not able to fit with my 290 lb. friend. My sister, who is 110 lbs, was fine to sit with my friend. I could snuggly fit next to my 260 lbs friend.
WindSeeker: Rode with my 260lb friend. They pushed down a bit harder on their restraints before the ride started. Im assuming my 290 lb friend wouldn't be able to ride.
Invertigo/Racer/Adventure Express/Beast: All rides were fine with both my friends. Was a bit of a tight squeeze but they enjoyed the rides.
Flight of Fear: Went with my 260 lb friend and they fit fine. If you have wide feet, your feet might be slightly uncomfortable. Assumed since it was tighter squeeze that my other friend wouldn't be able to ride it. But you can enter through the exit to check the seats if you want or need.
Delerium: Went with my 260 lbs friend and was fine. I assume my other friend would've been fine but was too frightened!
The Bat: The same as The Vortex, if you are taller I would sit in the front of the ride rather than the back.
Banshee: Both friends could ride. Yet my 290 lbs friend was very uncomfortable as they tried to push it down! My other friend said the restraints were tight! If you have larger thighs it might squeeze them a bit. But overall this ride was fun for them.
I hoped this helped!