I've got a Cables feeder which holds close to 400lbs.
1) It's got a built in ladder so I can load it without issue
2) It's 12 volt vs. 6 volt so it throws much further than other feeders
3) It costs more but given the added capacity I save money on gas driving out to fill it up which I can do half as much given the capacity.
4) I put on a solar pannel to keep it charged so it can go well more than a month without me showing up and still run.
I did have to weather proof the thing to make sure it didn't leak.
Spot