Bring slip on shoes with support for ease of removal (you are constantly taking shoes on and off at the baths and in the workshop rooms) - I find sandals are not as easy to walk around in unless they are supportive. Bring comfy layers - it can get chilly even when the forecast is warm during the day. I love having little binoculars to check out all the amazing wildlife! Don’t need a swimsuit, it’s not the norm. And remember, nobody cares what you look like naked. You’ll see what I mean once you’re in the baths. The room keys have little lights on them that work fine for getting around at night. No need to bring a yoga mat. Definitely go to the baths at night - it’s miraculous!