It's not much but if you're skiing you can use the letter 'A' to remove your ski stick and it doesn't seem to cost any time to do, so, a spear would be ready to go with both hands. Also, if you're carrying a bow/spear in position #1 and a ski stick in position #2, you can 'Wield' a javelin or an arrow, etc, in position #2 without having to give an order to drop the ski stick. It will just replace it in position #2.
In reference to Palu's point about arrows, IF you select an arrow without equipping and then choose not to fire, it will still use that time segment but the arrow will NOT be equipped.