When we think about local dealer service and warranty - we think about the RV being mostly away from local, because we use it to travel, so if it breaks, we're usually miles and miles from the local dealer ... so, to us that doesn't enter into it ... Either we're home, and it sits, or we're on the road no where near the local dealer. Of course, if you camp local, that advice doesn't help.
We bought ours in Delaware, at an auction (full warranty) and the only time it broke down (Fridge), we were in California, so ran it over to manufacturer and it fixed fridge and found a few other small items that needed a fix too and did it right there -- we overnighted in their parking lot with E/W HU two nights, no dump.