You should be happy with the late model Tahoe 3rd row seats - they're a nice compact split bench that has seating for 3 kids (or two adults) and all 3 belts are integrated into the seat backs at a slightly lower profile than the 2000-06 models. I think you'll want the brackets to fold them up or remove them completely - the convenience factor should not be under-rated.
https://www.youtube.com/watch?v=G2fmQqjdJ1I
Save yourself the reupholstering cost ..which has become super-expensive these days... and grab the 2nd row "fold & tumble" seats from the same truck to use for your front buckets. If you need 3 across seating up front also (total vehicle occupant count = 6), then use a GM or Dodge middle console/folding seat between them with same or similar color/material. Yes, front retractable belts would need to by mounted on a roll-bar, which you most certainly will want if you're concerned with belts anyway.
These late model 2nd row F&T seats were mechanically operated to fold down and tumble forward by rear lever -or- electronically by push of a button if that option was ordered. The button(s) are located on dash and on C-pillars, which would be both trick and convenient, but I suspect the wiring harness and motor operation for them is tied into the main vehicle's CPU.
https://www.youtube.com/watch?v=uVKGV3mIij4