I have had mixed results with rehydrating tobacco. Generally, I have found that drier is better, making for a cooler smoke. But with aromatics, it usually takes out the flavor. So I had some Carter Hall that had dried out nicely and I tried some blackberry extract on a pouch with about 5 pipefuls. I had gotten some black raspberry made by Lane and it was OK but not wonderful. I tried my own recipe with the extract and it worked like a charm.