I have a 2008 Sequoia, which had the higher tow rating but only a 1290 payload. I pulled a 6500lb trailer which had a tongue weight around 900 lbs after I added some extra batteries and full propane tanks. I also found that the relatively small wheelbase made for more challenging handling. I used a Equal-i-zer WDH and added airbags to keep the rear end level. Always worried about the fact that after hitching up the trailer, I only had 390 lbs of payload remaining for passengers and gear.
Eventually decided to get a F-250 which has a payload of 3200 lbs and longer wheelbase.