If it were my property I would first take soil samples of the funnel then lime the Hell out of it, I'm sure it needs it! then I would start working on preparing it for clover all the way thru the funnel.
When you start figuring out how they move thru there, start planting shrubs to define the shape of the funnel. This will let you set up on them a little easier. Maybe the D.N.R. can give you some Silky Dogwood, Gray Dogwood for a visual block to make the Deer feel secure and something to munch on too.