PA,
I 'fessed up that I was over GCWR. However, I didn't "break the rules" lightly or ignorantly. As I said, I was able to load and keep each axle, vehicle and trailer, under GAWR, and I was able to keep the individual GVWR's in check, but I was 700# over on GCWR. That was packing the trailer as if we were tent camping. One small bag of clothes for each person, a folding chair per person, and food. No water in the tanks. I tortured the family for 90 minutes on the scales on opening day of the trip to make sure I was as balanced as can be. She went up and down the Canadian Rockies like a dream; best towing experience I've ever had. I kept engine and oil temps in line and I kept her slow and in-control. (I did install an aftermarket tranny cooler to help mitigate my concerns.) All that said, I'm already eyeballing 3/4 ton vehicle replacement-- too close for comfort and it's not fun sweating the load out. A lesson learned; but, courtesy of this forum, I knew enough to test and double test before I pushed the envelope on the weight ratings.
