OK, some tips for you… First, I recommend reading the book Honeybee democracy by Thomas Seeley. It has tons of info on what honeybee swarms look for in a new home. Very well researched, and it gives all of the ideal criteria. There are six or seven things that bees specifically look for in a new home.
I’m not sure what size wine cask you have. The ideal volume of a storm trap is between 10 to 15 gallons.
Other things that can make it more attractive are: 10 to 15 feet off the ground, rub some propolis inside to make it smell more like home, use lemongrass essential oil which mimics a queen‘s pheromones. Also, the ideal entrance size should be around 15 cm² karma, and also adding at least one frame with old honeycomb will be helpful.
I don’t know if the wine smell would bother them, but I suspect that they would not be thrilled… Good luck and let me know if you catch anything please.