I recommend searching the base camp where the previous objective started first. Sit by the fire to receive the first of Lara's Journals. There is also a Document nearby, as well as a bag which you can burn to receive 20 Salvage points. Notice that you've also unlocked access to another part of the Coastal Forest. It's a good idea to sweep it thoroughly for collectibles (further information in the separate part of the guide).
Your current mission destination are the ruins to the north-east. To get there, you're going to have to go through a new section of the forest, but this time you'll need to be on your guard: small packs of wolves will be pestering you quite regularly.
As soon as you notice them, fall back somewhere safe (preferably a hill) and use the bow to attack them. In case of direct danger, follow the instructions by running or dodging. For each wolf you kill, you'll get 10 XP, but if you also manage to collect meat, there's another 20 XP in store for you. It's a good way to "clear" the hunting ground, not overlooking the deer and rabbits, though.
Depending on preferences, you can stay on the main path or go sideways, all the while keeping a constant eye on wolves. The ruins, your destination, are pictured above; the game will trigger another conversation with Whitman (reward: 100 XP).