I asked about the warranty and they assured me it wouldn’t avoid the warranty. My brother in law had the same concerns about towing in the mountains but we will mostly be on state highways and state roads. We get the hitch for free so I’m gonna ask them about paying extra for an upgrade. This is my first 5th wheel. I’ve pulled goosenecks and bumper trailers daily. Always nice to know as much info as possible.The bad thing about the GN adapter is that most places will use that as an excuse to void the frame warranty. I have heard mostly good things about the Andersen hitch. There was some chatter about the frame of the hitch bending in adverse conditions, but I have no experience with it.