Once you've had your fill of Ground Zero, the Warehouse area is going to be your next crucial step forward.
How to Get to the Warehouses in Escape From Duckov
You can find the path to the Warehouse region by following the forest trail north of the bunker's main entrance in Ground Zero. From the crossroad near the bunker, go to the left, then just keep heading north past the trees and hostile ducks. You'll eventually reach a camp next to a pond, and just a little bit up north from there is a big, cracked wall. The path to the Warehouse area lies just beyond that.
The quickest way to get to the location mentioned above is to take the wormhole just north of the hideout entrance. You'll need a grenade to break the wall there.
How to Destroy Walls in Escape From Duckov
Cracked walls can be destroyed with explosives, like hand grenades and dynamite. Equip your chosen explosive in one of your quick access slots, then hold your Fire button to line up your throw. Release the button to chuck the explosive, but mind their damage radius.
You should be able to buy a grenade from the Vending Machine back at base. They're fairly cheap, and if there aren't any available, look for sticks of Dynamite instead. Otherwise, look around Ground Zero for explosives — Tactical, Weapon, and Ammo Boxes have a small chance to contain explosives. The route we used for making quick cash in Escape From Duckov includes two good spots where you can potentially find explosives as well as bigger guns and gear.