“Will every state also have to have import restrictions of its own on this, if they decide to keep it illegal? Are bags going to need separate state-level inspection and scanning for agricultural products when traveling interstate, like there is in Hawaii? These are also my concerns.”
That’s exactly how it works now in those states with high tobacco taxes.
I can see the similarities you’re drawing, but where in America is it illegal to possess tobacco, not just illegally dodge taxes on it?