Here are more designs of the structures I wanted in the environment. I'm posting this late, since I forgot to scan them in.
Designs for the canopy tent, hut, concept of tree house/main house
More designs for the tree house and hut.
The models for both the tree house and the hut don't have any detail on their roofs. I plan to populate the roof with branches and leaves. Both structures will have a bushy head on them. Same with the canopy tent.