Since it is reflective ( not ideal ) I would follow what Sirius says above, but if the conditions permit, compare it to sunny F16 and see if it jives. If you get fresh snow over everything and a blue bird day, you can go sunny F16.5 and get lots of nice texture in the snow if no people in it.
I take my M3 and M6TTL up all the time and go no meter simply by experience, ISO 400, overcast day, 1/250 @ F4-5.6, backlit sunny, 1/1,000th at F11, etc, etc. I snowboard about 100 days a season ( sorry Sirius, don't agree he needs to go to Deer Valley, we have been around long enough to know how to check our our blind spots ) and would never bring a reflective meter, incident 100% of the time. In fact, I only own either incident or spot meters. I'd get a Gossen digisix ( I own two ) or Sekonic L-308 and be 100% sure if if were me.
Just be aware that even if you don't get fresh snow during your stay, there are always lots of great shots to be had, you just have to refine your vision, find shaded areas that have not been beaten down by the sun, things like that. But yes, fresh snow is always the most desirable, as my attached photo will clearly express...
Have fun out there!