Is 6,150 too heavy for my Roadtrek to tow?

How does the Roadtrek tow the Zinger? Is that 6150 for the Rockwood empty or loaded? If empty, plan on another 1000 lbs of stuff that you'll pack in there, so you'll likely be at 7000 when you hit the road. You won't know if you are under the 14000 GCWR until you weigh the RoadTrek, which I would advise doing as a first step. I would also weigh the Zinger and see where you stand with actual numbers before deciding what to do about the Rockwood.

I'll admit you don't see many with Class B's towing a travel trailer.