Siberian Wilderness - Final Coin Cache and Crafting Poison Arrows

Gather all the resources you can. Then head back up the hill toward the base camp. Just before you reach the camp, the path splits. Instead of going to the right, toward the campfire, head to the left.

Drop down from the ledge to the path below.

Dig up the last coin cache (3/3), which is hidden at the base of the ledge.

Head away from the ledge, grab a little more hardwood on the way, and then follow the path up and around to the camp.

Approach the fire and press Interact to access the Base Camp interface.

To unlock the ability to craft poison arrows, open the Inventory section.

Select Ammunition.

Then select Poison Arrows (skull-and-crossbones icon).

Press A/Enter to craft 2 poison arrows (the maximum you can carry right now). This uses up two arrows, one piece of cloth, and 3 mushrooms.

Before completely exiting the menu, be sure to spend the Skill Point you (probably) earned after surviving the bear encounter. I recommend the Hunter skills Breath Control or Animal Instincts if you don't have them yet, or the Brawler skill Thick-Skinned.

NOTE: Depending on what you've collected so far, you may also be able to upgrade your climbing axe—by choosing Weapons, then Axes, then the Climbing Axe, then perusing the possible upgrades—but don't worry if you can't do this yet. You may instead want to conserve your cloth for bandages.