All kinds of things you can do without disturbing the woodlands.
-Identify fruit and nut trees. In an area that size, chances are pretty good you've got some groceries growing.
-Identify your sugar maples. Come late winter, tap them for maple syrup.
-Gather up fallen biomass. Be it leaves for
compost and leaf mold or logs for the fireplace. The compostables you can pile up around the place, go get it when its ready to use. Chances are there are some spots with a thick layer of leaf mold already built up over the years. This can be mined for use in cultivation projects.
-Watch the drainage patterns in the spring. You don't need any surprises. Small creeks can become raging rivers. Low areas can become lakes.
-Keep an eye out for game trails.
-I've seen estimates of 1/2 cord of firewood per acre being a sustainable harvest rate per year. If you like good old fashioned hard work, there's 10 acres of firewood to work with each year.
-Be sure to read up on hugelkulture.
-mushrooms can be grown in a forest, check out the fungi forum