I don't think these modern 14 PR tires have issues with flat spotting, or at least my research has not found any problems to that extent. However, I do tend to lean toward the ridiculous overkill as stated above by storing our 36CK2 on jack stands with the rubber just barely touching the concrete. If you store for several months inside a building you have a perfect opportunity to work on the under belly of the camper, and believe me, once to start removing the panels you'll find lots of small details that need attention, i.e., insulation adjustments, securing the auto level device, zip tie & wire loom, lubricate the bare metal slide mechanisms, tightening straps on the water tanks, and adding additional belly panel supports. Do it now before the problems pop up next season.
2017 F350 Dually 6.7
He who dies with the most tools, wins!