Filter probably not. Bridges I'd say yes. I know last August we did a commercial raft trip with my sister's family down Bridges at 0.9. I was amazed they were able to get the rafts down it hitting as few rocks as they did. It's pretty mellow which worked good for my younger nephews.
So provided you don't mind bouncing/scraping down rocks and aren't talking about a 16' raft, Bridges should work. Heck they were even running Pineview at that level too!
All depends on how many rocks you don't mind hitting/running over. Me, I'll
happily take my kayak down silly low flows (Pineview/Bridges at 0.5 is still good fun) other's disagree with me, so you may want to take this with a grain of salt.
"Basic research is what I am doing when I don't know what I am doing." -- Werner von Braun