rough calculations put it at 5200 pounds. Dogs and people and blankets and incidentals and all. Does that sound right?
You need to work on payload capacity numbers with your truck, not "Towing specs" or trailer's GVWR. This gets into tongue weight, weight of cargo and passengers, and the truck's payload capacity. There should be a sticker on the driver's side door jamb stating, "all weight of passengers and cargo not to exceed..." or similar. That is the important part of estimating the vehicle's worthiness to pull the weight, not the printed "Towing capacity".
With a Tundra you should be OK but I don't know the exact numbers and I think you'll find that after you load all the gear and cargo into the trailer, your tongue weight will increase. Adding in the passenger and cargo weight into the truck, you'll see that you are now approaching the payload capacity of the truck. There may not be enough capacity left for that 500lb. load of firewood you planned to carry. ;)
