We've never had 7 feet of snow at once, but we've had a little better than 3 feet at once with 12 feet total for the winter. You make sure you have a good blade on the tractor, a good friend with a tractor mount snowblower, and lots of chain to hold the gates up when you have to take them off their hinges.
The wildlife comes through everything just fine, although the deer usually end up eating trees and getting into farmers hay yards...
Rod