Right. Like I was saying, the 1500 lb payload rating does not include passengers, fuel or cargo. And the 1000-1100lb pin weight readings you are seeing are dry weights. Real world weights are considerably heavier (propane, battery, gear, clothes, dishes, food, etc).
I'm not saying don't do it. Just do your homework and be real careful. Good luck!
Jeff, Laurie, + kids
Three time former Sunline owner
2011 Big Horn 3670RL Fifth Wheel
2012 Chevrolet Silverado 3500HD D/A DRW, Classy Chassis Conversion, aka "Garage Queen II"
Hensley Trailersaver BD3 Air Hitch