I've used the 2 line method for decades; Attach a locking carabiner (from my rescue kit) to a decent rope (I use 8mm kernmantle static rope), toss the end with the 'beener over a high enough branch about 4-6' from the trunk, bring it down to waist height and snap in the second rope, make sure both ends of the 2nd rope will touch the ground when pulled up. now pull the 1st rope until the 'beener is about a foot below the branch and tie it off.
To raise your food, tie your 2nd 'beener to one end of the dangling rope, snap it on your food bag or barrel, and hoist it up. The 1st 'beener acts like a pulley, reducing friction on the branch for easier lifting, and stopping the ropes from rubbing on the branch which protects both your ropes and the bark.
This uses the stuff from my pin kit in case I need a "z pull", so I'm carrying it anyway.