LB,
You' re just jeleous you deer won' t readily consume the extremly nutritious, incredible amount of tonnage provided by the brassicas.

A late summer planting of your favorite clover in combination with a brassica mix, is one of the best 4 season plantings available. A clover/oats combo isn' t too shaby either for agricultural areas. Either way you get a great fall draw, and your clover gets good establishment for the following spring without the mess of remaining rye or wheat to deal with....just pure juicy clover.
While clover is my base for early spring/summer/early fall, and a minimum 40% of my fields are in clover at all times, with 70% in the summer, I have to have a great fall draw in place on the plots or the clover falls way to short in competing with all of the bait piles in the area.
Nothing like a combo!
Jeff...U.P. of Michigan