Re. Airbags: the airbag compressor is not continous duty. I doubt it will survive running long enough to pull down two batteries.
some more thoughts:
What voltage does the camper battery show?
There are not many electrical consumers in a truck or camper that can run down two (or possibly even three, with the camper battery) fully charged 70-something Ah batteries in one night. Leaving the truck lights on, or the fridge on 12V, might. A single dome light won't do this.
Do you know if you have a battery separation switch of sorts between truck and camper?
Having the camper on shore power does not necessarily guarantee that the fridge is running on shore power, though it normally should. But it may have been inadvertently set to 12V, or something may have gone wrong.
15 minutes is not long (enough) to charge the batteries. You'd need to know what their voltage was before the jump start.
In any case you need to find out if the problem is with the truck or the camper.
