Yes I put out a feeder in the offseason, mine will be out in the next few days. I feed grains, oats, and corn which are all readily available in farmers fields around our land during warmer months. It allows me to see what deer are still around and it keeps the deer on or close our land when shedding antlers, which is another big reason I do it is to hopefuly find more sheds.
I also feed alfalfa hay during the winter months, especially at times of extended cold temps or snow. I keep it off the ground to keep moisture out of it and the deer absolutely love it, plus it seems to last longer and is inexpensive in my area, I got bales last year for $5 and they last 2 weeks which is better than $20 of corn, oats, grains that lasts 1-2 weeks if I am lucky!