I own that exact camper, it is a beautiful camper and what worked best for my family. on the service side of things, my dealer is also a ways away, they are 3 hours. I currently have it there for service, I had a minor issue prior to that and I called PT to ask if there was somewhere closer who could work on it, they provided me with a list of dealers they had close and I called them, none was willing to work on it since i did not buy it there and if I wanted them to I would get put on the "list" and they would "get to it". I also had one flat out refuse to work on it period. I now have a local small dealer/repair shop who is willing to work on it and and just bill PT for the warranty work as they are now a service center. So yes other CAN work on it but that does not mean they WILL. PT was a huge help finding me somewhere closer though.
2014 Prime Time Lacrosse 329BHT Luxury Lite Touring Edition
2015 Silverado 2500HD DMAX