Clothes. Please. However there can be exceptions to that rule! To keep warm, bring/wear layers as mornings are chilly, and winters are freezing!
Put on your closed toe shoes and you're good to go (we have dirt tracks that can get a bit muddy in winter, so don't be wearing your Uggs (which are slippers by the way), instead choose some decent shoes that you can rely on).
Empty your pockets, or else you'll make an unwanted donation to the river below. We have cubby holes to keep your stuff safe.