we just came off the main on thursday. 8.1 ft, 34,000ish. pretty much what buckoff said, big & powerful. Mostly managable if you are a strong rower & can come up w plan b&c on the fly. we saw one cat flip (another story) and had one of our party go out of his boat for a long 5 seconds before he pulled the miracle move and somehow got back behing the oars.
Mallard was buried, not a problem.
the waterline was right up to the steps at buckskin bills, maybe 4 feet of beach.
Whiplash was a motherf%@^&r!!!. A lateral moving left to right that is a lot grabbier than it looks literally typewritered the first two boats to try to cross it for the sneak right into a stopper river right that is the start of a long bending wavetrain. after watching the first two get sideways in that mess i gave up on the idea of crossing the lateral and just hit the entry wave as hard as i could. after the front half of my boat re-appeared (with girlfriend still in the boat, woo hoo!) i just kept it straight and eventually got over it.... into a big, meaty, long wave train. possibly the hardest hit i've ever taken in a cat.
the only other one that really stands out in my mind was chittum. it was just big and busy. again, just keep straight and enter hard.
we had 6 days, spent 3 days on the water w/2 layover days, and never spent more than 2.5 hours a day on the water. GPS said we averaged 11mph.
PM buckoff, he is a deep well of info for the main.
Never get out of the boat