Wish I was joining you all, Golden West is a tremendous holiday and to do it at chrimmy would be great. My first JY trip was this holiday (2010 but not christmas)and i loved every minute of it.
For the record numbers were similar, was 18 of us and its a good sized group to get to know everyone, with bigger groups people tend to break up into smaller groups. The other advantage is on the coach you can spread out and all have a seat apiece, some of the scenary is stunning and having a window each is a big bonus.
Mick