I like the bus idea but we've got to remember how this game works. A newbie fresh to the game and a bandit who just got sniped and ended up back on the coast look very similar for the first 5 - 10 minutes of their new life. They'll have to be unarmed or surrender their weapons before they're allowed on and they'll need to be at gunpoint while they're in camp.
If it goes pear shaped and we get a rogue player then so be it. That's just DayZ.
It's worth it to give this a go.
FIGHT THE DEAD. FEAR THE LIVING.