I spent a lot of time reading all of these threads and stressing about this.
I was just there this past week- I am 5’6, around 270 pounds, large (but squishy belly), really thick thighs, large butt And hips, average calves. I watched all the videos on getting in the seat and followed them- I walked all the way in, stomach smushed against the seat and feet all the way forward before sitting down and used my arms to pull myself forward while sitting up very straight when the restraints were about to close. I was able to fit with no help from the cm. It was such a relief and the ride was the most amazing thing I’ve ever been on. Feel free to ask me questions