Be wary of false economy on seed purchase. Weight as well as % germination (current, not last years numbers) of the bag you purchase. On top of that, doing a good job seeding your plot and getting the crop up ( Brillion seeder over a grain drill for example). Don't forget to have proper pH levels as well for Clovers, they are more tolerant than Alfalfa, but nowhere as tolerant as grasses. Some varieties resist frost heave better than others as well. Things to think through.
You and the deer may well like a certain crop but it may not be as suitable to your plot as another. I spent many years in a farm supply store and came to the realization that sometimes it is easier to bring the mountain to Mohhamad, so to speak. It may be easier to plant what works best with your system rather than changing an entire system to suit a plant. Maybe you could divide the plot with a solar electric fence charger. Not really sure how deer would react to a hot wire, but rotateing "pasture" might give your plot a chance to establish better.
I mean no slight to your thoughts or abilities.