A couple of pics
the drift boat is what you don't want to do.
The snake river below the dam is not a beginner multi day whitewater run. the rapid in the pics is six miles below the dam. it is a solid class iv rapid. anything can be portaged when sitting at home. on the river it is a different thing.
The snake being a mulit day trip has its own rules and regulations wether it is permit season or not. You need to find out about them. ie firepan, groover(for taking you feces out with you), ect. whitewater equipment is its own thing. Very specialized. Do your research on this one. Go to youtube and googgle wild sheep rapid, granite rapid. The snake is also dam controlled and the water level does fluctuate daily.
What type of craft are you thinking of using on this trip: cat, raft, drift boat, kayak, inflatable kayak, jet boat?
I ran a 16 foot whitewater raft thru there and did not feel overgunned.
the three pics of the grey raft is me and my wife going thru wild sheep rapid.