It's time to flip through our Miller Nurseries and Musser Forests catalogues. In fact, it's almost too late but not quite.
I have used both of them quite a bit for wildlife plantings at the farm. Berries, nut trees, apples, cherries, chestnuts, pines, etc. I just let nature deal with them. Some live, some die, and some are eaten by the beavers or deer. Wire fencing around them when they are small doesn't hurt, but still...
I also re-seed our pastures and meadows with clovers every few years. I simply spray-spread the seed on top early in the spring, and hope for the best. Seems to work OK, but clovers do not have a long life-span. Worn-out New England hillside meadows need some nitrogen from the clovers, especially if they are not nourished by enough cow or Moose or bear poo. The flood plains do just fine on their own, as long as they get flooded regularly.