My guess is that was a pack of girl scouts.  We found the same thing at a Quetico campsite earlier in August.  Probably 20 small clusters of tp mostly by the tent pads.  No feces anywhere so I assumed we were dealing with young, rookie females in the woods not wanting to venture far from the tent after too much cocoa around the campfire.  I used my hand spade to collect all the piles and carried it back to the woods and buried.