Would require a mixin into https://github.com/ferriarnus/VivecraftMod/blob/Multiloader-1.18/common/src/main/java/org/vivecraft/gameplay/trackers/BackpackTracker.java . Would be DISABLED by default, as overwriting another mod's behavior by default is not good. Also, users are already required to configure the bag, so they'll be configuring it anyways, and this is another option.

Reach behind and press left click to grab bag. Repeat the process to put it away.

I hope the class this mixin will target doesn't get refactored around TOO much. Vivecraft Mixin is definitely pushing forward with things, so I don't know if this will get caught in the metaphorical crossfire.

That said, will definitely add it for now. Super useful and nice to have.