I traded an '06 Dakota for my Tundra. At the time last year we still had our 19' hybrid 4100 pounds loaded). The Dakota had a 230hp V8, 3:55 rear end, and a tow rating of 5500 pounds. Put the Tundra on that hybrid, and it never knew there was a trailer back there.
Then my wife realizes we can pull a ton more camper, so SHE starts looking through our dealer's inventory. I would get these texts with links to various trailers with "Can your truck pull this?"
So you've been warned... Get a bigger truck, a bigger camper won't be far behind. With the 5.7, Toyota automatically puts the 4.30:1 rear end on with the tow package. Regardless of how many or few options the truck has. Which means it's very possible to get a 1/2 ton tuck with a 9700 pound tow capacity for $30K. That's a hunk o' truck for the dollar.