I intentionally don't have a TPMS on our Class C, but here's some comments:
1. TPMS systems are just another level of complexity that can cause air leaks themselves, or eventually fail to accurately indicate, or otherwise let one down such as in forgetting to periodically replace their transmitter batteries.
2. I carry along a tire-fill air compressor and a trucker's nozzle for the compressor's hose so as to deal with the rear duals.
3. I carry along a rubber-head hammer to quickly check the inner tire of the rear dual sets for firmness whenever stopped.
And probably most importantly, I can easily feel when one tire is low among the rear duallies because the motorhome's handling definitely feels "way off" - soft, squishy, wobbly, etc. - if a rear tire is low or flat. This is from experience, as I've had it happen once and it was obvious that something was wrong.
