We have air in the garage, but the heat outlet right in front of the bike has a solid cover on it, so could add a vent there. We haven't needed to heat the garage though.
We stored one of our 4 dining chairs and one of the recliners in the stick home. Then we put the remaining recliner, with the foot stool on top, in the place of the missing dining chair on the couch side of the table. And one of the three remaining dining chairs is at the desk. It's nice only having 2 chairs at the table when we're set up.
If we didn't have 2 bicycles in the garage, we could store one of the recliners in the space to the front of the desk. But with just the 2 of us most of the time, we don't really need 4 chairs and two recliners.
As for the ride and level, the Firestone air bags and Air Lift wireless controller is the best thing we ever did for the ride and leveling the truck.