The way it will work is this: The Greens will buy the two parcels of land, hold it, and as soon as Congress authorizes the money, the Greens will sell it to the Govt. at several times what they paid for it. It's a nice little racket. The Govt. could just as easily buy it directly, but they allow the Greens to "save the land", (nothing to save, it's not going anywhere). the govt. Greens help their enviro-buddies, and then the Govt. can expand the park, close the road and lock up the land.
They see this as a win-win. To the taxpayers, it's a lose-lose. The press plays along with this scam and acts like this is wonder because the park is being enlarged, the land is being "saved", more endangered species will be protected, the evil timber company will never again cut trees within sight of the park, and the land will be preserved for some mythical unspecified "future generation."