Add an overlay for where ice/snow is that can be toggled at any time to the map. If toggled off regular summer map, if toggled on winter map. Maybe delete the winter map every winter if you can't/won't overlay everything you haven't seen for LARP/technical reasons, but PREFERABLY just give people an accurate map of where snow/ice is for every uncovered tile
Real. Been suffering map wipes because I can't remove cum stain on my minimap whenever I explore new areas during winter.