Everyone is running shuttles as far as I know. Weather wise depends if a storm is blowing through or not, otherwise it should be sunny and in 70s-80s? We ran it late Sept 2012, it was great weather, except due to forest fires the smoke was everywhere. I still slept on my boat every night.
Water wise it was 2,000 cfs at White Bird and plenty of action on the river. I'd say lower water was a bit harder than family friendly low teens. I have a video of that time frame on my youtube channel, since I've posted it so much on the buzz, if you are interested jump on my Youtube channel (so I won't spam buzzers with my footage
Also, it's low season, so you can camp in any site you come to, which is great since you don't have to make specific mileage.
Enjoy the trip.