Well if you like the outdoors, there is a ton to do here. But personally, I don't think its worth it until about July, by then its finally warm enough to enjoy everything, and everything is actually open as the snow has been cleared, like glacier national park, don't go there right now, waist of time. Missoula area is very good for fly fishing I've heared, but everything up here is flooding right now from melt off, so I'd think fishing would be crap right now.
Hey, I went to Glacier last year in June, it was amazing. We camped at Bowman Lake, just astonishing. Loved it, what a beautiful state.