I have never had bug issues on A, B or C below flaming gorge, did have a bull moose charge me on the c section while I was floating. Seen Mtn Goats on A section, Otters on A and B. If you do Green make sure to tour the Dam with a pocket full of quarters.
Time is like a river. You cannot touch the water twice, because the flow that has passed will never pass again. Enjoy every moment of life on or off the river.