I’m heading out to walk the Tour du Mont Blanc with all the variants in late August/early September. For the most part I’m camping “proper” in the valleys but will have to spend a few nights out wild on the hill if I stick to my plan. Trying to keep my pack as light and unbulky as possible to conform to airline rules, so wondering if anyone has done anything similar later in the season and can advise whether one, two or three-season bag is most appropriate. Thanks!
Did it a few years ago in early September and was hot evey day and didn't really drop cool at night in the valley so I would say two at most, prosume you will have a jumper or coat to pop in if it does turn cool.