The cache is a Skunk Ape-sized ammo can that was stashed in the woods by a small ape-like creature. Minimal bushwhacking is involved and Junglito's swag was inside the container when the Little Bigfoot hid the cache.
The Swamp Thing is a humanoid/plant elemental swamp monster that resembles an anthropomorphic mound of vegetable matter. He fights to protect his swamp home, the environment in general, and humanity from various supernatural or terrorist threats. Swamp Thing smells like decaying vegetation and mud.