for sure, and a colorado card would give you possesion, but not right to grow in montana, you would have to have a MT card for that

btw if you are still thinking about getting one here- i would say ask for all your records from your local doctor when you go in, because other wise your going to have to have them send all of the records to you later

but good luck man, hope it all works out for you, enjoy bozeman the skiing is bomb over there..