I would bring 1 Minolta with 3 lenses: 24, 35 and 85, and 1 Pentax with the 20 and 50, both with colour film, possibly one slide film and one colour negative. Shared in two it's a small weight, and you are going in winter. As a possible addiction the second X-700 for the occasional B&W shot. Holiday trips are the colour domain, generally speaking I would give up B&W and I wouldn't give up the 20.

The Minolta 58/1.2 is heavy and not really needed on holiday.

If you can add weight, then it's better 2 X-700 (the second for B&W) and 1 Pentax and to leave the 58/1.2 at home.