More on the campgrounds, The one on Brownlee is called Woodhead campground, the one on Oxbow is called McCormick campground. It is the smallest.
The nicest one on Hells Canyon is called Copperhead. It is also the largest. My favorite is Hells Canyon Park. Just in case you wanted to look at them on Google earth or photobucket, or flickr or something. The road in from the Baker side is pretty good, the road in from the Idaho side is a little narrow in some spots, with a pretty good downhill grade right by the Brownlee dam.