warramty work on new 5th wheel

What type of issues are you having? For items such as fridge, a/c unit, awning, furnace, water heater, toilet, etc. you can take it to most RV repair centers rather than to a dealer. Those items are covered under their own manufactures warranty such as Dometic or Norcold rather than the RV's manufacture. Thus, you do not have to take it to a dealer. Most RV shops will handle component warranties.

You still have to go to a dealer for service on the trailer itself, walls, roof, plumbing, slides etc.