Rent a Ozone Generator, plug it in and let it run for a couple of days. Repeat if necessary! I used one in a stinky van that I bought. It smelled like cat urine. The smell was gone in one day and never returned! Ozone will kill any smoke odors and the odor doesn't return!
If you have ducted ceiling vents for your air conditioner be sure to close those vents otherwise your heat will escape up the ceiling vents and you will end up heating your air conditioner! Many people forget about this!
I have mine plugged into a timer that goes on 2 hrs. a day, My smart charger charges the house batteries and the Battery Minder charges the engine battery. Been doing this since 2002 and never had any problems!
Sit in the drivers seat. There should be a placard where your left elbow is! No,max pressure on the sidewall is not the correct pressure. That is disinformation! Weigh your coach when you can. Until then, use the wall plac.