You can also make your own wood stain from a bunch of different kinds of plant stuff.
Once you've got some plant stuff, simmer a handful in a quart of water for an hour. Add water as it evaporates so that it doesn't burn.
Let it set til it cools off, then pour it through a piece of cloth or a sieve so that you get just the liquid.
Add a half a teaspoon of Alum (it's in the spice rack, or the spice section at the grocery store) as a fixative.
Now, when I think woodsy camoflauge, I think green, black , brown, and tan.
For brown: coffee grounds, oak bark, tea bags
black, sumac leaves
green, spinach, stinging nettles, red onion skins, and grass
orangey tan: regular onion skins, orange lichens, and tumeric (that's in the spice rack too)
Hope this helps.