The Sequoia suffers from payload issues, like all the competitor half ton SUVs. Check the driver's door for this sticker with as equipped payload. Note what they have where my TV has 2051:

Is 1300 pounds enough? 1100? 1500? Family, cargo, and trailer tongue weight are considered part of payload.
The 5.7L is sweet and everyone towing with it loves the power.
I'll put a plug in for my TV. 2008+ Suburban or Yukon XL 2500. All have 6.0L, 6-spd, 3.73 axle, LT tires, integrated brake controller and at least 2000 pounds of payload. We enjoy all the luxuries of 4 heated captain chairs, NAV, backupcam, sunroof, 3 zone climate control, Bluetooth, etc, all the while towing our TT and kids sleeping.