Let's combine some ideas! String a cable between two trees. Hang the feeder on a pulley so you can refill it. Put an electric fence charger on the cable to prevent coon or bears from performing their "high wire act". When they climb either tree and touch the cable they get shocked. A bird landing on it, shouldn't get shocked, but maybe I'm wrong? Don't tell the bears how to run the pulley system. Use rope on the pulley or you will get shocked also!
OR, get 6 pieces of 1 1/2" X 10 ft conduit and 3 couplers and make a 20 ft tall tripod. Hang the feeder from the top with a pulley.
Spray the legs with SPAM for baking o make them slippery. Stake the legs with 12" galvanized nails and hose clamps.. Or find an old windmill that's not working any longer. Remove the ladder. Makes great perches for the birds. If it works and can generate power, all the better.