The ranger office can give you pretty good info.
Here's my info:
Pumphouse is an easy family run. Much flat water so plan something to keep kids entertained.
The camping is good to great. Good secluded sights that are very pretty. The only drawback can be the several million ton coal trains that rumble through in the night. You may think it is thunder. The camping is mostly in the middle of the run--perhaps a little closer to the end. Each campground is marked with a BLM sign. There are a bunch of campgrounds. They may fill up. No car support for the river campgrounds. There are car campground spots on the river at Radium, but they are awful and they fill up quick.
Andy Horn likes to suggest the section between State Bridge and Dotsero. It's pretty and doesn't get the boat traffic. There is some camping. I think those campgrounds are more likely to have car access. A great online guide is http://home.mesastate.edu/~jerry/guide/colorado.html
Also see http://home.mesastate.edu/~jerry/gui...discussion.htm