I'd cut a hole in the bottom and mount a timed feeder on the bottom, then hang it from a tree limb or on a chain between two trees using a small hand winch so you can lower it for filling. The biggest problem I have had with barrels like that is that the corn, or other feed, has moisture in it and it will mold making a mess (I'm in an area that is real humid). I think if you take one of those closet moisture traps and hang on top of the corn inside the feeder it would be a lot of help in that regard.