I normally wouldn't have done a report on this one but Nate pointed out later that we only had 900 cfs at Heisson, yet we had more water than the Oregon Kayaking crew, which had 1100 and felt that was too low. I have heard elswhere that this one is hard to gauge, I am guessing there must be a lake or marsh at the top that buffers the flow and brings it up slow, but also drops slow, given that we ran it at 900 dropping to 800 and had a flow that was bearable. To gauge how much water we had, the Oregon kayaking site has a picture of the punchbowl drop in final five, the day we were there Nate slid down the creek left side of the drop that is completely dry in the photo. We had considered it more of a sneak route given the amount of water in it than a seal launch if that makes sense.
Anyway, a bit of info on flows couldn't hurt. I don't know if this will help, but it is something to consider. And even though people don't like to run copper for some reason, it is a good one and worth while.