Every drift has a rapid! some drifts have one and some 20. Thats way more chances to screw up. How wide is the boat? That will matter to. An 18 has to be kinda wide! and at 5 to 6 boards theres not much room for error in some of the rapids. I,ll give ya a hint. Put in were the boards are measured the first time...Remember to scout when ya hear alot of raging noise...