Something that I had forgotten about is that I used forks to lift, move and transplant some 15' high balled and burlapped trees awhile back. In the old days I would use my bucket but always tore the bark or did some other damage to the tree. With the forks. I could hold the tree over the hold to gauge approximate fit, and if correct, just back up with the tractor and slide the tree into the hole. Worked slick and way faster than the bucket.
For the bigger trees of maybe 400+ lbs, I would usually have to adjust the tree in the hole and by tipping the forks forward and sliding into the hole could wiggle the tree close enough to straight. Forks are the only way to transplant b&b trees.