If the resort has a parking lot, worst case scenario, you can just hike back and change them out. That is what I do when at Lake Louise. I have to make a decision everytime I go to Sunshine in Banff as to what the conditions will be like because its a 25 minute gondola ride each way. I have the M2s. If you can see sunshing throught the "Goats eye" they I put on my bluebird goggles. Otherwise, 99% of the time, I use the low light. I also have Oakley Crowbars. BOTH my low light lens and bluebird lens - Crowbar - are cracked due to putting them in my pocket. They crack up/down where the nose piece is. So putting lenses in your coat near the hip (my place of choice) or your pants is asking for trouble. They break very easily - AND IT IS THE INSIDE LENS NOT THE EXTERIOR ONE ON THE CROWBARS.