Snaplage was all the rage around here in the 70's. In the 90's you could buy dusty old snapper heads at auctions for iron price. Most guy's reason for quitting them was that they were too slow, it was easier and faster to call in a guy with a combine and run the high moisture corn through a roller mill at the silo. Combines will also work in a wet field that you can't go in with a pull type chopper and a heavy wagon full of snaplage. 

Still see some snapper heads listed for sale every fall, I saw some this fall but I can't recall where.

Is the corn standing good? If so, you could just cut it really high. That wouldn't be a lot different than snaplage, since a fair amount of trash gets in with that too.