should i raise tires off the ground for long storage

nykolas wrote:
for a couple of years at least

That's quite a while. I'd elevate them or maybe spin them around every year so a different part is making contact. Also, how old are the tires? It might be time to consider changing them when you do eventually move.

Aside from the tires, if I were leaving my RV stationary for that long I'd throw it up on the blocks just for my comfort while using it.