Multiple layers of clothing, gloves and insulating soles for your shoes. Regulate heat by opening up and letting some cold air in for a short time if you get too warm. Where i live, some people are still walking around in a simple one layer at degree over 5-10' Celsius. If water 'aint solid, it's not that cold.
Myself i'm looking forward to try out my winter camping gear i bought on a summer sale last year
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"It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring" (Carl Sagan)