I just did that trip a few weeks ago. Camp areas are few, at Dominguez canyon there are three camp areas, one right at the moth of the canyon that can hold a fairly large number of people, one about 50yds down stream just after a few large boulders on river left that is a much smaller area with little flat land and alot of tamarisk (also mosquito infested), and the third spot is about another 50 yds past that on river left. The last spot is a very large spread out area with cottonwoods and can hold alot of people. Beware of "Gunnison Bob", when we were there a canoe guide who had a group of about 10 canoes at the put in was discussing with us where we planned to camp, we had two rafts and a canoe for 12 people, seeing that we hadn't been on the river before we asked him about camping at Domiguez, he said the middle camp area was a "great campsite" and that we should take that one if it was open. Well we got closer to Dominguez and pulled into the 1st area at the canyon to see what the situation was and sure enough the 1st area was taken and then "Bob" and his scout boat raced past to take the last area. The middle area is not the best spot, I would hardly consider it a spot at all. What is river etiquette on this at all, I think it was pretty rude for him to tell us that the obviously worse spot was "a great site" and then he proceeded to scout ahead of his group who didn't show up until an hour later to get the good site. Anyway, after the canyon about 1.5-2 miles down stream there are 2 more large spots on a peninsula shortly after the train tracks head into a tunnel on river right that looked good, large flat and cottonwoods, and there is one last spot on river left about halfway between Dominguez and Whitewater. We christened this last camp which we stayed at the second night "Camp Poo" for the extraordinarily large amount of cow poo throughout the area, if it wasn't for the poo it would also be a great spot, large flat and cottonwoods. This last campsite is after a drop with a very large and slow moving eddy on river left that will suck you in and make you paddle the last 40ft to the camp area on river laft. We put in on Friday morning and Dominguez was filling up, that is the prime area due to the side hikes, the last area had a good hike but was full of poo. The two areas in between looked good for camping but you are on a river bend peninsula that is cut off by a cliff and the railroad so there isn't much hiking there however you most likely will be alone there. We were there at around 5000cfs and the diversion dam they warn you about was runnable over the top, and the float went by fast (putin to Dominguez about 4 hours). If you are camping at Dominguez and a train is stopped accross the river, cross the suspension bridge and see if they will let you on the train to check it out, they let a couple of the people I was with on board and they got to flash the lights and honk the horn (great fun no matter how old you are), if you have kids they will get a kick out of that.