Maybe that is true, as you'd be locked inside and dead. But shouldn't that be up to the individual to take that chance, just like it is our responsibility to ensure we have favors? Rhetorical.
I have a vague recollection that dying in pseudo-rooms like your caravan interior (or a vault) is a very, very bad thing in Dragonrealms's engine. Being dead and locked in might be the least of your problems.
"Warrior Mages don't bother covering up their disasters.