I'll be interested to see the replies you get, since I will be having a 36 footer delivered to our permanent site next October.
I am not sure how you will level it from side to side, with out a tow vehicle, but in my case I can move it onto boards or lynx levelers with my tow vehicle.
Then I will level it from front to back using the tongue jack.
Once it is all level, I'll use concrete blocks as pilings and capstan jacks, (screw type) with iron shims to get it permanently off the wheels.
Then I'll remove the boards or lynx levelers
jack L