Hi, Bad knees are bad.  Just had a friend get a new one.  It went very well.   I love Aspen also!  I was going there for a week in the past.  Went six years in a row.  Now I am hooked on Salt Lake City.  Just got back from seven days of fresh powder.  I am in Bellingham Wa.  Mt Baker just got a foot last night.  I am getting in my truck now!  I tried snowboarding but back to skiing.  Whistler is a great spot.