You allowed one bottle of wine each to drink in your cabin. We did this last August and had no problem at all with it.
Sorry, I didn't read all of your question. We went with Celebrity Cruises.
We went on the Sea Princess last year and had no problem taking wine on board. We took a wine box with us and also bought wine at nearly all our stops . Even though our bags were scanned no one said anything . We kept it in the fridge or out on the side in the cabin .
Thankyou for your replies.