We stayed at Salmon Lake on 2 different occasions in June 2021.  We were lucky enough to score last minute reservation on the lower loop. The lower loop is right on the water and has only 2 campsites, #22 and #23. These two sites are farther down the hill so we did not hear the street noise that other campers complain about in the upper loop. We were tent camping when we stayed in site #22 and #23,  Site #22 has a very nice covered picnic table and is large enough to accommodate a large RV or trailer. This  lower loop only has pit toilet but the upper loop has flush toilets and  very clean showers.  We did appreciate that they sold firewood at the campground for $4. This campground also has very nice walk-in campsite for cyclist and hikers.  We enjoyed both of our stays and would highly recommend the lower loop since the sites were right on the water and you had more privacy.