Got a couple days? These things take time to learn, and cannot be treated through anything you read on the internet. You need to have intensive training before attempting to treat severe injuries such as you describe.
Is the sucking chest wound just into the chest cavity, or is the lung itself pierced? What is the extent of the wounds to the rest of the area? Are there flailing ribs? Is the person conscious?
Too many questions to even begin to address this sort of intensive first aid in a forum like this.
This is the part where you dial 911. Tell the operator what happened and where your truck is parked. Then you pick your friend up and you get back to the truck ASAP. You are in the woods. Nothing around you is sanitary. You pray that God grants you the strength to save your friends live. That is the best advice I can give you.