5 acres of beans and the deer wipe the out? That's a lot of deer! Just checking how you did your beans when they failed, you definitely will want to plant forage soybeans for deer, ag beans can't tolerate grazing nearly as good, and when planting forage soybeans for deer a very high seed count is needed to stay ahead of the deer when they first emerge, 30" rows are spaced way too far, allowing deer to much chance to wipe them out.we have done beans in the past and they get into them so fast they never make it to full growth.
I plant 2 bags per acre or heavier of Titan forage beans on 4 acres on 7.5" rows, whereas farmers will generally plant 1 bag per acre of ag beans on 30" rows.
These forage soybeans will still grow pods to feed deer in the winter, generally more pods, but smaller size beans, but our deer never complained.
IMO for someone who has at least 3-4 acres, soybeans are still a top three choice for a food plot, corn and clover being the other two. Grain and Brassica come in at number four, good stuff, but the window of usage is too narrow.