Leave well enough alone.
It is stored indoors out of sun and possibly extreme cold weather/winds/snow/rain ect.
Tires do not "need" to be isolated from concrete, wood, stone, gravel that is nothing more than an old "wives tale".
As long as your storage does not have extreme moisture concerns, I do not see any reason as to why you would worry about "running" things like furnace, fridge and so on just for making sure..
As far as wheel bearings, they are reasonably sealed from moisture and they should have plenty of grease and you are storing indoors, there is no reason to go to the hassle of hooking up and towing 10 or 20 miles.. They will not go bad or freeze or break sitting.
Tires losing pressure is normal, 1-2 PSI per month is considered normal, simply add pressure to sidewall max rating periodically which you have already done.
You didn't mention the battery, as long as you have a multistage converter, leave it plugged into shore power or disconnect battery and use a manual charger once every three months.
Thats it!
By the way, the 30+ yr old TT I am using sat on a campground lot for 10 yrs before I bought it. All I did was fix a broken brake wire, replace the breakaway switch and add pressure to the crusty cracked tires and towed it home 18 miles that way..