Remember too, carry enough water for your travels, then fill tank at destination. Thirty-six gallons equal 270 lbs. Save yourself 200 lbs with less water on the road. Shop main groceries often. Take minimal heavy tools. A few necessary tools, fine, but you can load up a few hundred pounds of metal if you overdo it. Pack light, laundry more often. Little things like that make a lighter load. You could save 500 lbs if you load TC and truck with a little forethought.
Think also, heavier weight cruising around local camping area roads at 30 mph is a lot less dangerous than heavy weight on a highway at 65 mph too. Load water and groceries at your location, and dump before you leave. Fill water at next CG.