Been 32 years since I owned a MH and it was a Dodge Xplorer with the floor cut out, you know the one made in Brown City MI. Dodge had a resistor that would pop, you couldn't see it (it was out of sight above the openning of the van hood)Took 2 minutes to change, it killed the motor. After that I started carring a spare resistor + a full set of belts, a jumper battery, fuel filter, Hose repair kit (tape works here too), 1 gal coolant, trans fluid, engine oil (2 qts each) and a few tools. Not much room in that MH but used most of above at one time or another.
When I buy my class A I will ask a service tech what have you seen in common break downs with this unit? If it's under a grand total and I think I can change it, I will carry it! Might even buy parts that I can't change out myself if dealers don't normally carry it .(I'll ask a few dealers in my travels if they have that part in stock) ..... Yeah I know it's not nice to ask a Mechcanic to install my parts but if they don't have it in stock and I do they shouldn't refuse. I will buy/carry a spare tire and think everyone should!
That's my think'n anyhoot ! victorydaveAnyone that owns a diesel MH that doesn't carry a spare full filter(s) and the tool to remove it is asking for it in I.M.H.O.