4wd and stock tires sufficient?

Hi, we’re booked to head up to the ski resort tomorrow morning and I’m a bit concerned about the drive up the mountain. I have a midsize pickup with 4wd but currently running stock all-terrain tires that are anecdotally pretty terrible in snow/ice. I have limited experience driving in icy conditions and I’m trying to avoid a dangerous situation for myself or others.

Should I pick up some chains or sandbags before heading up? Or do you all think we’ll be okay with 4wd and driving with extreme caution? Thanks in advance