Food Plots in the hill country?

Anybody in the hill country plant food plots, and if so what do you plant. This was our first year at the new place and we have some beauties. We are going to be putting in several plots to help our herd reach its potential and I was curious as to what others are doing. I just bought an old fire truck so I can water them and come spring we are going to plant. Just don't know what yet.

we gave up on it, couldnt get enough rocks out of the plot areas