You don't want to be alone with Clem when you encounter your first herd. It's bound to happen if you run across the country and if you go into a city... you are not gonna make it either. As much as you don't want to be in that group, you need to be! You won't stand a chance on your own and that's the sad truth.
My plan is to stick with them until I find a better group. Then I'm ditching them.
I might take Chuck though. He seems like a reasonable fellow.
If you don't know what a herd is... well it's like 100 times bigger than the zombies chasing the train.