I bought seeds from the local Co-op and a local hunting store. The Co-op's seeds were a bit cheaper. Both were mixes of annuals and perennials. White/red clover,timothy, alfalfa, turnips, kale, rape, chicory, and a bunch of stuff I've never heard of. We planted three mini plots of Rack Stacker SuperBuck, Sweet Success and Coop seeds.
I did my plot in a field that has been fallow for the last 15+ years (nothing planted, hay cut occasionally).
It was alot of work. First we mowed the grass then tried to use a large roto-tiller. The roto-tiller nearly ripped our arms off the soil was so compacted. We then borrowed a plot mule from the Co-op and pulled that behind a Jeep and an ATV. It didn't have enough weight to do much to the already fairly dry, compacted soil. We piled cinder blocks and sand bags on top of the damn thing and still never got the 6-8" of penetration we wanted. 3" was probably the average and this is after spending a couple weekends driving in circles.
Eventually we figured enough was enough and we threw the seeds down and ran the roller over everything. I learned not to over seed, otherwise everything grows tiny because of over competition. The Rack Stacker Seeds started growing alot faster but half of the plot was over seeded so it didn't end up doing much. We didn't roundup/fertilize so our results weren't that great.
There was suprisingly little animal activity in the plot. Deer seemed to walk through more than stay and feast. The whole experience was dissapointing. I'm going to give it one more go this spring but if things don't improve I'm going to abandon the idea. I suspect the deer may have too many other options nearby that they know and prefer. The turnips didn't even get touched unless I pulled them and tossed them in the bait pile.
You may have better luck if local food sources are limited.