I play alone and will probably always. I've been playing the last couple of weeks and got maybe 15 or so hours of exploring in. I've only seen 3 other survivors and that was just in the last couple of days. The first guy killed me with an axe 5 minutes after I spawned. He was a fresh spawn himself. The other two were a group that shot at me at the castle. I was hit, ran into the bush, bandaged myself and circled around them and killed them. So my only survivor contact has ended in three deaths. BTW, thanks to those two guys for the loot and for not DC'ing during a gun fight