We have camped here a couple of times, once in summer with full heat and right before 4 of July weekend. The second time was in the spring when there are a lot fewer people!  Nice open areas under the trees but not a lot of privacy. There is plenty of water to play in but is better for those with speed boats. If you use kayaks, stay along the shore to avoid a dangerous situation!  The Fort still has a structure with exhibits inside to visit and a nice bluff trail that overlooks the Spokane River. Great swim area with dock for those hot summer months!