Well...

If Fictional: I would probably try to take over the entire S.T.A.L.K.E.R. map... there are many instalations there and I know for sure that if one fails we still have the other ones.

If reality: The best possible place I could stay in is an army base. IF there are enough supplies, and lots of the vehicles intact, I'd probably go nomad ('ey, get lots of food, people having experience in killing zombies, lots of weapons, many vehicles including 1 tank, mix them in and you got a total massacre).