You have my attention but not my understanding. Sometimes I need to be spoon fed and I'm not ashamed to admit it. I have not set my mind to this yet but I am very interested in your set up........

1/2 inch rope around the tree........do you secure the rope first and if so how? Truckers hitch?.......is the loop in the tag end or is it a dropper made in the middle of the line?

How do you achieve the differing heights for the 2 bags or is one on the ground? I can't remember if there is a place to allow for a snap on the bag.......if so does it stay level? Double ended snap shackle? I am familiar with shackles for anchors......would this be similar to a double ended snap that would be on a dog leash? Actually I am completely confused but am determined to implement something. Maybe after my second cup my brain will start to function and I will say "Ohhh, that's easy"  ;D

A picture would be worth a thousand words. It may be helpful to others as well........in fact your name just might be immortalized in camping lore........"The Gavia hanging system" (Patent Pending)  ;)