I posted this suggestion in the other camp supplies thread:
Even with the new system, long rests are effectively unlimited because there is TONS of food in containers everywhere. It isn't fun to click every container to hoard food, but the current system encourages this.

To fix this problem, why not make camp supplies come from combat instead of from containers?
Most supplies should come from looting enemies, not from containers. This would allow you to fine-tune how many encounters there are between long rests. For example, a hard encounter (the Githyanki) might drop 40 supplies, while an easier encounter might only drop 10.