There are no magic beans for a foodplot so planting one in a very isolated location may indeed be a lot of work, even for the throw and grow products out today. Even the no-till blends need proper PH and a respectable amount of lime and fertilizer. Also, if this area isn't totally isolated and would enable even a couple people to hunt over it then it certainly wouldn't be worth your time and effort. You can totally shut down a small foodplot with just a couple hunts under less than ideal conditions. Very risky, in my humble opinion.