We hang deer feeders by a home-made tripod constructed from three 12 foot or 14 foot 2X4s (or 4X4,s , depending on how big the feeder ) and t-hinges. Put a large eye bolt where the hinges come togather and hang the feeder from it.
We have found that bolting a boat winch to one leg of the tripod is necessary to hoist the feeder because of the weight of a full feeder.
The advantage if this set-up is the ease of relocating the feeder and removing it in the off season.
I recently made an 8 ft. tripod for my 30 gal. feeder. Welded some angled pipe onto a 1/8" plate and bolted the plate(bracket) to the barrel using rubber washers and silicone to prevent leaks. Then I used a larger dia. pipe(legs) to slide over the brackets and bolted together. The legs can be easily removed for transport. Works really well. I have to back my truck up to it to fill is the only bad thing.
Moose calling can get confusing to some, but cow calling is your main tool when moose hunting. If you go out and buy moose calls I would say you're wasting your money unless it is the birch bark cone. I find most store bought moose calls sounding worse than puffing a grunt your hands to make the call. You can roll up a piece of birch bark in a cone shape to use as a call and spend your money on a video that teaches you the basics of a cow call. A milk jug or a coffee can with a hole and a rope...