I'd be more concerned in getting something they want in a small plot, to come in strong and healthy as opposed to trying to put in a larger plot that comes in only so-so. Part of making a good food plot is fertilizer, and many times that costs as much if not more than the seed itself. A half acre food plot containing something desirable is plenty in many areas to draw deer. You may also need to fence part of the plot in order to keep deer from eating it all before season arrives. I regularly fence half of my quarter and half acre plots, not only to save it for later, but to see what and how much of my plots the deer actually eat. This tells me what I should plant next year. In your situation, a shady pasture mix might be all you would need, otherwise a good clover mix, once established, both would last 4-5 years. They would still require some form of fertilizer and to be mowed/cut several times a year. This is especially true in larger plots where the deer themselves won't keep it trimmed. My suggestion would be to plant the perennial you want, but leave one or more smaller patches of a 1/8 acre or so to plant fresh fall greens like Oats/Wheat/Rye and cowpeas or brassicas.
