The left crack is actually smooth as can be, as it Woodstock. We kayak through there at 1000 or lower and swim rafters through at 800 and below.
The thing is that you don't want to swim ABOVE Woodstock ... which for most kayakers would be a challenge anyway because it all happens pretty fast. For rafters and duckies the potential for falling out above Woodstock is MUCH greater, and therefore it's much more dangerous.
The rapid is dangerous for kayakers at this level in that you could bang up your knuckles and get a good head scraping or blow a shoulder, maybe take a face shot. Avoid the top right undercut, stay in your boat, and it all flushes through.
The dynamited rock is just river left of the 'dogleg crack' - not in it or below it. So yes it looks gross when you scout, but the actual 'crack' looks like bedrock.
Not sure what hole .. I don't think there is one actually.
PS - the rangers were far upstream, hundreds of kayaks canoes and rafts ran through with no problem. Commercial rafts were running it and I saw only 1 raft get stuck on the pillow and 1 flip. I couldn't find anyone to take the bow of my Duo or I would have run that through as well.