I think you can make that float in 2 days with the cfs that is running. I think a first nights camp would be at Burnt ranch rapids and then on down to coffin rock. I guess you are going on a scenic trip. The Bass fishing will be off until the water drops and warms up a bit. Usually by the 2 week in june it is in prime shape for a small mouth bonanza. I usually do this float in 4 days 3 nights leasurly camping and hard fishing. Lots of neet stuff to explore along the john day. Be respectful of property rights, much of the river bank is private.