LTB's are a great off road tire. Seen a few people running 34's and they do well. I got 31" LTB's on my tracker, and I love em. On road is a WHOLE 'nother story. They wander alot, and are loud. And they will wear fast also. Not a good tire for a DD!
TTORA forum is the best Toyota off-road club around. We are nation wide with chapters in most states. Come in and discuss Tacoma, 4Runner, Highlander, & TRD models.