Vail's refund policy is not to refund.
I had to cancel my trip to Canada in February due to a vertebrae fracture. Fernie refunded with no penalty, however Vail/Whistler refused, which is now with travel insurance.
All the details of refunds are clearly outlined on the FAQ section of the website.
In summary :
Epic pass : no refund
Booked day tickets : refundable
Booked lessons, ski rentals etc : refundable
Accomodation owned and operated by Vail resorts : refundable
There are some caveats for things booked after 22/3, as they still have the option of reopening then. However, I can't see any scenario that would improve the situation to the extent that they would reopen in a weeks time. If the closure continues, then presumably things after 22/3 would be refundable as well
Just looked at the cams, looks like a beautiful day up there