I agree...reaching under the camper to pull the snap pins on the rear gear or adding blocking is a 'get down on you knees' kind of procedure...can't see a way to avoid it.
BTW as we're discussing the front and rear gear, I'm installing a set of SteadyFast stabilizers that I had on my previous camper. If you push on a corner of the camper, front and rear, you'll see quite a bit of movement. The add-on stabilizers will eliminate most of that. There'll be one across the front, a second from a front leg back to the frame. As the spare is located between the rear gear, I need another plan for the rear. I'm thinking that I could install one manual scissor jack at the rear on one side and run the third arm from the foot of it to the frame on the opposite side. It's an easy install...just need a little warmer weather.
Dave