While SM and before, our troop had no formal rules about scouts sleeping alone. If a scout was new and inexperienced he usually would pair off with another scout. If we had a new scout without a buddy I would ask an older scout to step in and be a buddy. Never a big issue. As far as hammocks, we could have a couple of scouts bring one along with their tents. Nevr had any only hamick camp. We did have about 5 leadrrs who would on occasion.
This year my webelos son took his hammock to camp ( so did I)
Life is Good!
Hammocks * Scouts * Kites