Rear drive or four wheel in the snow on the mountain?

Hi, my parents have a small hut in the mountains. Access road is actually always covered with snow/ice. Since the driving fun on the piece is not to be missed (driften) am I thinking about what is better now? – Rear wheel drive without electrics with 75% lamellasSparrow e.g. BMW e36 – Allrad ala Subaru WRX STi or a Lancer EVO In how far can you get the mountain with the 1st variant well up? To cross-country it is guaranteed better, but probably only if it is flat? In how far can you reach the mountain with the 1st variant? the four-wheelers change the distribution? Only max. rear wheels and ifs never progresses ever more direction front? Are there locks for the al-wheelers? Do narrow tires bring great advantages with a version? Thank you