We were riding the Idaho BDR (Backcountry Discovery Route) and needed a place to camp near Pierce.  There aren't many options that are accessible for our Support Truck but found Deyo Reservoir as a welcome spot.   The West sites are very open and close to each other and are what you see first.  I kinda stumbled down to the East Campground which is more for Truck/Tent camping and is wooded and cooler (it was 95 degrees when we rode in).  Typical for Idaho the sites were nicely spaced, well maintained (it is hosted) and the Vault Toilet was very clean.