You should see some of the biggest class III you can find anywhere. If you have anyone on the trip who has seen the river before and knows what's coming up you should have no problems. The jetboats can give you the willies the first time you see them coming UP the river you're going DOWN, but the pilots are up high enough they can see you and they are great about letting you pass before they forge ahead. If you see one coming up on you in the flat they will appreciate it if you hit an eddy until they can pass and they usually try not to bowl you over with their wake