Blackwell Flats is one of 4 free, first come campgrounds in the Libby Dam coriander. It is manged by the US Army Corp of Engineers. The campground has 7 sites and is located on the West side of the Kootenai River approx 3.5 miles downstream from Libby Dam. Access from Forest Road 228.  There is a boat ramp with day-use parking onsite. There is little to no shade and there is road noise, but for free, it is terrific. For an amazing tour, drive Forest Rd 228 North, maybe 30 miles, until you come to bridge that closes the upper end of the Reservoir. Cross over and follow that road South until it meets back up with 228. A beautiful scenic drive.