Has anyone had any luck booking a ski vacation at either Sunrise Lodge in Park City, UT or Valdoro Mountain Lodge in Breckenridge, Colorado if those locations are not your home resort?
Yes, I have book both last year and again this year without using my home weeks. You need to book exactly at the 276 day window. Park City seems to have more availability than Breckenridge outside of the home weeks.
I do also have both as home resorts during ski season. I have watch both resorts closely this year because I was curious.
Park City has a 2-bedroom now starting the week of March 17 during ski season. You can book the first 3 days now and then add 2 days to the reservation on Monday and a day each the following days (until you have a full week). But I expect that this will be taken very quickly. I do know that the 3 & 4 bedrooms are grabbed immediately.
Last year, Breckenridge had some openings in early December for January (when some start cancelling reservations just prior to the 30-day window).
If you have specific dates, then that will be more difficult.