Retired01:
My experience is that a VW dealership will look at the VW portion (engine, transmission, dash and associated electrical) and make repairs. Now I live in San Antonio and have a VW dealership that I have used for minor repairs to the VW portion of the coach. HOWEVER, I have heard from others (usually around a campfire) that they have had issues with dealerships not wanting to touch it because they consider it a Winnebago, not a VW.
Knock on wood I have never been completely stranded; jumped the batteries before (That'll happen if you leave the vent fan on to cool the coach while parked at Antique store for 6 hours in 100 degree south texas heat!).
I guess my 2 cents would be, don't try to do anything that would put you in harms way. Travel popular roads, during the day; If you dry-camp do it near a phone or a WalMart (you know they let you park overnight, right?).
My RV mentor always told me this about his '59 Cortez: "Any day it doesn't break down is a good one!". Good advice for an RV traveller.