I believe I would check all pressures at least once-per-month; six tires, spare tire, & air bags. When you are parked upon a level surface, the counters inside should also be level, so you can add or subtract air to trim.
The 26T is a very comfortable floor plan. When I purchased my 22M, my salesman's favorite was the similar 26A
. My son and his wife went on a couple of trips with us, and it worked-out very well; even on the smaller 22M.
Welcome to the Forum.