I still want to go there, initially i thought i'd take the usual trip to New York / Las Vegas / LA , but now it seems to be compulsory to stop over in Colorado and smoke some weed (legally) ;-) No need to go to Amsterdam anymore hehe.
True, as a tourist you can buy weed in Colorado but you can't smoke it. Legally you can't smoke in public, then your hotel also bans smoking in the rooms so your stuck there also. The only place you can smoke weed is at your own house in colorado or a friends place. Try book a private Limo, I think you have some wiggle room that way or find a weed smoker who will invite you into his home.
http://www.gq.com/blogs/the-feed/2014/01/6-things-to-know-colorado-weed-tourist.html
I'd love to go to the States one day. In fact I've actually got family in Texas of all places. However if I ever go it won't be in the near future.
You're so lucky you have family there. It's like having the first access to the states.