From there, go to the treehouse. You talking about the tree house in Deep Jungle? The door closest to you will take you to the tree house. Climb the closest vine after the cutscene to get to the Climbing Trees, go around clockwise until you reach the second exit, there should be a Blue Trinity nearby, use it to get a Treasure Chest that contains Dalmations 31, 32 and 33. From the tent, go to the hippos' lagoon and jump your way to the vine far from the entrance. You can drop down into Hippo's Lagoon, or you can use the tree trunk again. Then climb the ivy to get to Climbing Trees. Go back to camp. Hop across the pools to the other side of the Lagoon and climb up the vine.
Climb them, and you'll reach the Climbing Trees. Then go through the exit to the Treehouse, a cutscene plays showing Clayton attempting to shoot Terk.