I just carry a Victorinox Classic or Rambler, so I may be the wrong person to ask ;-)

In winter, I take the smallest, lightest multitool that will allow adjustment of bindings and repairs to skis/snowshoes.

Unless you're hunting, building a big fire, or heading off for survivalist-style living, all the other knives are for fun and play, but not necessary, in my opinion. So, take what you'll most enjoy having along.