Excellent unassigned camps include Honaker, False John's, and John's Canyon. When you sign up for camps, make sure to get Slickhorn C or D- it's the coolest hike, especially if there is water (which there was not this year in July). Grand Gulch is a great camp, but if you also stay at Slickhorn, it makes for a long, slow 13 mile row out on the last day- I recommend choosing between SH and GG and then staying at Oljeto or Steer Gulch the final night. Pros and cons- both will be buggy, but Oljeto has an awesome hike if you get a tribe permit to hike on river left and Steer Gulch has a choice of camping behind the tammies against the cliff or on a giant sandbar away from the bugs. They are 7 and 5 miles from the takeout respectively. Hope this helps- have a great time!
"There is NOTHING--absolute nothing--half so much worth doing as simply messing about in boats. Look here! If you've really nothing else on hand this morning, supposing we drop down the river together, and have a long day of it?" -Wind in the Willows