Unless you know for sure that the pot got completely dried out and was very light when you took the wilty pic- that does look more like rootrot to me. Google weather has your overnight lows WELL out of frost range, though a killing frost would cause the same visual issue. Get all those blackened leaves away from the buds right away. Leave any leaves that are still mostly green and perky. You might be able to limp her a couple more days but with your local humidity being what it is, be on the lookout for black/powdery patches on the buds. If you are using pots with built in drip pans, don't use them next year. They don't allow good air circulation, and can harbor the larvae of fungus gnats which will destroy roots and spread disease.
When you harvest, give the muck (I suspect you will find muck!) in the bottom a good sniff. I'll bet it smells like a swamp, if it was rot : (
Yes you can dry and smoke unfinished buds but it will be a fast not ideal high with a crashy comedown. Fine to cook with if you get them to a high enough temperature though.