Fast water
If the river is really flowing fast you don't want to be fishing and trying to operate a boat/pontoon/raft/ at the same time. It is a recipe for disaster.
If you are by yourself then fish from shore. You can chuck & duck a streamer on a sink tip line or you can nymph fish fairly deep below a strike indicator. The streamer will get you out into the middle of the river while the nymphing technique will keep you fairly close to shore, which is where a lot of fish will be anyway.
Just don't try to float and fish at the same time unless you have someone operating a row boat or ridged framed raft.
Larry ---sagefisher---
Organizations and clubs I belong to:
Fly Fishers International Life Member
FFI 1000 Stewards member
FFI Presidents Club
FFI Fly Tying Group Life Member
Washington State Council FFI
V.P. Membership
Alpine Fly Fishers Club
President & Newsletter Editor--The Dead Drift
North Idaho Fly Casters club