My trailer didn't move for 19mo. I did nothing more than run the stabilizers down on the 4 corners on top of a wood block to keep them from wearing in to the dirt/gravel base. Then I wrapped the trailer with a OSB skirt backed with 1" foam insulation. Lived in it during the week.
At the end of my assignment, I pulled the 'skirting', added a little air to the tires, then pulled 300mi home. That was over a year ago, still on the same tires.
If you know you are going to stay for a awhile, I would jack on the frame near the spring hanger, pull the tires, then lower down on to a block with a wood topper placed either on the u-bolts or just next to the u-bolts (depending on your spring/axle configuration). Watch out for lowering the trailer too much so that you can get underneath and access plumbing and electrical if necessary.