Thought I'd share what has worked for me, and what hasn't. I used to build ground level trickle feeders...they were cheap and effective, but went through a lot of corn, and when the hogs arrived, I had to go to off-the-ground feeders. I ruled out feeders on tripods, because they're such a pita to fill and service, and worked out a design for a tripod/winch/cable/pulley lashup that works pretty well. A "deer hoist" on a limb works pretty well for feeders up to 150# or so, but the 55gal feeders, which, when full, weigh nearly 400# require a winch. Plastic containers are good in theory, but in practice, squirrels will eat a hole in them trying to get to whatever residual corn remains, once the feeder is "empty". Steel rules, and I have built feeders out of 10, 20, and 30 gallon garbage cans, as well as 55 gallon drums. The 10 gallon size is pretty handy...holds 50# of corn, and one man can hang it on a fixed hook. More later.