Just a casual thought: if you go walking in the European Alps outside the summer season, many summer day walkers will be a bit in awe.
But if you go camping outside the summer season, most walkers will really be in awe.
Some Refuges – those really in the mountains, may have a ‘winter room’. This is unlocked and has a few beds and maybe a stove for heating (and water). Mattresses, yes, blankets – maybe. Down on the plains and in the valleys – very doubtful.
We have been in many small gear shops in the mountains there. They sell day packs, boots and joggers, clothing and jackets (and doo-dads). Tents, larger packs and sleeping bags – ‘we can get them in for you’. Of course, outside the season, those shops may not be open. No traffic.
We found fuel canisters in many supermarkets and even tiny village shops – at least they are open all year around.
Cheers