I had a 25'BF rear bed, and a 2007 Tundra 5.7 liter, with a Leer FG Cap, a Honda 3000 in the bed, and it towed very well. I have the weights if you want them. Unfortunately, the BF got totaled by an old F250 pulling old heavy fifth wheel that couldn't stop when the highway came to a dead stop over a hill in TN. He opened my BF like a sardine can, as he hit the left rear and went down the side to the front window. But it towed the BF very well. That engine has lots of pulling power, the suspension on the Tundra is a little on the soft side, but never had an issue towing.
Replaced the 25'
Bigfoot with a 1995 Holiday Rambler which had a gross
weight of 8000 lbs. Pulled it over the Rocky mountains at 11000' and all the way to Alaska, and around the country without any issues. 27K miles in one trip.