Processed deer feed?
 

If you had it choose one feed, what would it be?

Without a doubt BB2 is THE best feed and attractant both that you can use. Might not be in your area quite yet but if it is you can't go wrong! Amazing stuff. Cabelas carries it now. Originated here in Nebraska so it has to be good!!! :)

IMHO in a wild deer situation, I don't think you will do a lot of good putting out sack feed. If you had several square miles with a LOT of feed stations you might do a little good. You need a pen area with feed available 365 days of the year.
You need to remember that a lot of the natural food available for deer is just as high, or higher, in nutrition as the sack feed. You would contribute more in a wild herd to fertilize the natural food sources, like briars, honeysuckle, begalice, American beautyberry, etc, and it would be cheaper to do so.