The lower new raft lines are super easy, but even at low water it's BIG. hard boating, I'd strongly recommend a guide. But the upper new would be pretty mild until the end, where you'd get a taste of what the lower new is like. The last rapid and only recognizable and named rapid (according to AW) is arguable the largest hole on the river at levels around 1.5-3.5 ft. But the rest of the upper new is fun long mild wave trains.