Is that the Mad Hatter's Tea Party? It looks like fun. If you check out the pics on Trip Advisor, no-one looks very dressed up (or like Alice
). I'd go in my version of smart casual (ankle grazers, shirt, cashmere cardi, maybe with a silk scarf, ballet flats) or a simple shift dress/light jacket or cardi. I'm no fashion plate, though, and I hate dressing up. Lucky you! Hope you have a great time, whatever you decide to wear.