We just got off Monday, had 3-400 and 4 nights. made 12 - 18 miles per day without too much effort. downstream winds the whole time.
We were prety heavily loaded in the iks, no beer, but lots of rum and steaks for the grill. We had to drag boats at Gleason flats and a few other spots.
WW was III, except Island, unrunnable, rat trap, funky ledge deal, black rock, consequential manky ledge. We also missed the right channel at overboard and wound up out of water on the left.
low water skills definately at a premium -- but we didn't see anyone at all, and had perfect weather, a full moon -- great trip.
If the water is really low, consider launching at Gleason and taking out at horseshoe -- you get the best ww and scenery, and miss the wide low water flat problem areas.