Originally Posted by GPJourney
products like Armourall help slow down the damage to the polymers in the rubber.
That is a negative. Armor All contains petroleum distillates and that is a definite no-no with RV tires (they - RV tires - already have stuff in the rubber compound for long periods of no-use). Just about every tire product contains them, yes silicone is a petroleum distillate. Only a DuPont branded spray on tire product explicitly says none and I've found it only once. Use a cover, do not slather, or just do nothing at all to the tires since you are just parking for a couple weeks.
For more info on RV tires and storage get it from the horses mouth at the link below - read the guide in the "reference materials" also note the videos, one could possibly be a shocker to you.
Michelin North America RV Tool Box Page
BTW Air bags don't get smooshed when fully deflated, the axles settle on frame mounted stops and the bags just hang there when fully deflated. No problem keeping the bags aired up or fully flat or anywhere in between for as long as you want.
With the disappearance of nylon cord tires, weight on or weight off a tire in storage is only a matter personal preference, there is no technical/scientific reason to do either. However, keeping tires dry and covered from UV is still very scientifically valid.