half acre and late season really don't go together. The ONLY hope you could have for late season would be something like winter rye and even though clover isn't a top choice late season- you could add that. Even rye at 1/2 acre is going to be eaten to ground if there's a lot of deer. If it were me, I'd go in there late summer and do winter rye & clover. you could do the dbltree mix- ground hog forage radishes, peas, clover, winter rye, oats. I think most the goodies will get clobbered there too. So again, I think if it were me, I'd do a clover mix with winter rye late summer. Fertilize heavy & make sure you do it perfectly: timing, seed, weed control/killing, fertilizing/lime, etc.
Lot of deer? Late season, are you meaning like Dec/Jan or could you mean rut, like Nov? Secluded, small spots like that are tricky but do-able for sure.