If I were choosing between Lund and Tracker, I would choose Lund; it does not take much to pull kids on a tube; they don't have to go that fast at all to have a ride. So close to the water, 25mph feels like 60. You'd need a good tow rope setup and maybe one of those harness gizmos that goes vertical to attach the rope to. Ask somebody who pulls tubes and skiers about that, they will know what's up with tow setups. A boat ladder will be needed. Also, seating in the boat is a factor.