I guess we have all heard Folks running their diesels for a long time.
Doesn't usually bother us, inside the coach. The one time I can think of they were having problems with heat.
When our thermostat threw a hissy and it was over 100 and only the front air was working I cranked the engine a few times to get the dash air running. for five minutes or so.
Run it as long as you need too except when you are shopping for the perfect parking spot at 2:00 am please. Had a big Class B do that in Austin. It woke everyone up. Couldn't get it in so circled the park exited apparently and cam back in and must have had committee helping him back it in and ran the engine for a good thirty minutes.
Well live though.