Yes, I have a couple friends I play with. numbers definitely makes it easier but, when you have 3 people with axes they still aren't much of a match to someone with a M4A1. Also more people scavenging means less you get for your time. I find it easier to scavenge on my own and travel in groups.

Also get away from the coast asap. Bandits hang out in the coastal towns since it's the most common spawn area.