i hit it at somewhere over ~ 1+ ft. 2 years ago when they had that epic snowpack. we flew into shearer due to the FS closing a bridge to the paradise put in so i can't comment on the first 12 miles. narrow boats are best
. i picked up a older avon ranger just for the trip, 14 x 6.5. beat the crap out of it on that trip but it held up fine and really doesn't show much wear from the abuse.
there are places that just don't have clean lines. unless it's an IK or kayak, you will be stuck on rocks and a few mandatory big impacts on rocks. doesn't matter how good. it just doesn't fit in places clean.
i only scouted ladle and one of the IV's that had a downed tree blocking 3/4's of the entrance to the rapid. read and run rock dodging for the rest.
pics of ladle at low water. the highlighted line is the only line i could see for a raft and i checked the rapid from both sides and river right top and bottom. not a place to get side tracked,for sure. you will still have to work off rocks in the center and do some fancy zig-zagging too. the highlight is only a rough idea for where you need to be.
it's not a place for people who don't like gear abuse, bending or breaking blades / oars and really beating up your raft on lots of rocks. if you don't mind that though as the price of admission then it's still allot of fun.
an 18fter sounds utterly miserable to me on that run though,fwiw. actually anything big and wide is going suck and be allot
of extra work, imho.