I've had an experience where I met up with a guy in a barn, we went on for a while together, looking through towns trying to survive, and scrounge supplies. Unlike most people this guy didn't shoot me in the back, I went hey I gotta eat dinner, good luck, and off he went. We went our separate ways without killing each other, by that time we were both well equipped with lower tier gear. However I think most people prefer the lone wolf kind of playstyle because you dont have to worry about anyone back stabbing you along with the fact that all the loot you find is for you. I think with everyone adopting the KoS policy lately, lone wolf is the way to go IMHO, I'm no pro but being alone has worked better for me.