Pat, I purchased a pair of military green wool pants at DELKS SURPLUS MILITARY STORE, 336-629-0991. They are near Asheboro North Carolina. I'm thinking they were about 25-30 bucks. They look like the green Woolrich or Cabelas pants.
In early September the last two years I have been in Colorado, the wool pants were not needed. The first year a light smart wool under liner was plenty. Last year it was 50 at night and 80 mid day. I know it can be snowing and cold, but I would go for the smart wool under liner or longjohns and wear regular camo pants..