I did a 3 day from dennison to houchins last may, it was a heck of a trip, plenty of wildlife and great sights. Theres a cave right after dennsion to paddle up into. As far the fishing goes, i caught a plentiful amount using shakey head/drop shot. If youre looking to do a one night from dennsion to houchins it might be a little much, i dont know though, each person paddles differently, we were all in our kayaks. As far as scenery goes the best looking water was from dennison to the green river ferry, after the green river fferry the river gets deep and the water slows, if i were to do it again id to a one night two day from dennison to the green river ferry, that way you can relax, fish and get a good campsite decently early, and if its like it was when i went the water wasnt moving too fast so i was able to paddle upstream from the campsite to fish as well. There is an incredibly nice campsite virtually in the middle of the dennison to the green river leg on river left or you can just pick an island if you're tent camping. Either way you'll have a great trip. Let me know if you have anymore questions and ill try my best to help out!
Nick