Sounds like an awesome unit. Where did they put the air filter and CVT vents? Are they up high so you can go through water over 22" deep?
I don't know of a silencer for it yet but I can tell you it's most likely not too loud for hunting.....I've seen deer walk out right after a skidder drives by hauling a twitch like it wasn't anything out of the ordinary. I've also been using my chainsaw going down a fenceline and jumped deer only a few yards away so if you can't find something I wouldn't let the noise worry me too much. The only exception to it for me would be if you're hunting coyotes...they are wary as all get out.