2013 Silverado 1500, 5.3, 3.42, 3950 RGAWR, 9500 tow rating, 1565 payload, 7000 GVWR.
2016 Heritage Glen 312 QBUD, dry weight 7690, dry hitch 765.
Reese Dual cam with 1200 pound bars.
Went across scale at 8360 with a 640 tongue (miscalculation - thought it was 840 until looking at it again this morning). 5 duffle bags, 28 board feet of 2 x 6 and 2 x 8 (leveling, stabilizer jacks) and a camera bag were added - approximately 400 lbs - or 8800 pounds wet weight.
Axle was at 3840 without weight distribution. 640 on the tongue translated into 1280 on the rear axle. If I add 300 pounds to the tongue it should add 600 to the axle or 4440 or 490 over.
Truck had 960 left for tongue weight.
Yes it's close (if weight distribution brings the axle in).
Yes there is a bigger truck in the plans, it's a matter of when. I have one short trip planned for the year and then not until next summer.