Somehow I missed reading this thread. It is too bad you are not a neighbor or else we could work out a trade.
If I were you, I'd get myself a track loader. Preferable a caterpillar with front bucket teeth. I paid $20K for mine and it was pretty much a steal with a brand new undercarriage. Anyway, you can push all those small trees you described then back up, set the teeth about 6 inches into the ground, and rake the roots out. You'll have to "float" the front bucket across the terrain. Roll out the roots and drag them the other dorection (90 degrees diametrically opposed) and put them in one of your brush piles. Try to keep from pushing dirt all you can. Once you rake a section thoroughly, back drag doing the same thing in the opposite direction. That will help you level out any gouges you made and dispaly anything that is still inadvertently buried.
When you are done you can resell the caterpillar potentially for more nickels than you paid if you buy one right.
Be warned, if you buy a caterpillar and backhoe you'll have friends coming out of the woodwork!