There are three keycards to find across the island in Sons of the Forest. Here's the location for each.
Travel to the keycard location as shown on the Sons of the Forest map. It will be on thenorthwestside of the Island. Approach the golf cart ahead and start digging the ground near it. Use the shovel in your inventory to dig. As you shovel, you will see a bunker (Maintenance A). ...
While exploring many hidden locations in Sons of the Forest, several will require a keycard. The exact location for this keycard is difficult to find, and you must find multiple items before you can add this keycard to your inventory. When you do find it, it should give you access to ...