Check over your trailer's warranty. I suspect that you will find that your refrigerator, stove, furnace, water heater, water pump, charger, airconditioner, microwave, stereo, and throne are all under their manufacturers' warranties, not your trailer mfr's.. That leaves only your trailer's structure, frame, axles, wheels, coupler, house wiriing, and plumbing and tanks are warranted by the traileer mfr. The appliance warranties are national and can be honored by any shop -- that wants to honor them. Do fill in and mail all cards, and keep the instruction sheets in the trailer.
The other stuff rarely fails within warranty beyond the first few days of use. You are well advised to plan on a short vacation at an RV campground near the dealer to check out the unit in use. Keep notes on failures and plan allowing a few days to stop by the dealers before heading home.