My husband is going to attend meeting in Boulder in May and I'd like to come along - of course, accompanied by several cameras. Is that a good time to go? And what would you think are the main must-sees and must-take-photos-of at that time? As I understand it, Colorado is one huge must-see, of course, but is there anything to avoid or to do in particular at that time? It's probably around mid-March. Any input is highly appreciated!