3 years ago when i bought my property i did exactly what you are talking about. i went behind my father-in-laws house and dug up a mixture of evergreen and blue spruce, about 8 of each, and all were about 4-5 feet tall. it was november when i dug them up and planted them on my property and they haven't grown much in 3 years, of course, but thay have grown a litlle and none, except for 2, have appered to die. the 2 that have died, a little forky thought it would be hilarious to rub his tiny little antlers on my freshly planted trees, thay haven't completely died but they have to be just barely hanging on.
i don't know about the woods being fully matured, my property is about 65% mature, but i still don't see why it wouldn't work, it's definetly worth the try. good luck to ya!