Fort Collins is the main campus of Colorado State. It’s a great school - students tend to be above-average students, with nearly half of students in the top quarter of their high school classes and the average SAT scores between the mid-1100s and mid-1300s. Their health professions advising program is here: http://hp.casa.colostate.edu/hpAdvising.aspx. Students get a health professions advisor who guides them towards med school applications. They also offer a 12-week non-credit MCAT prep course every spring. Their site doesn’t say how many students apply to med school or what their acceptance rates are.
Like m2ck mentioned, I think you should think about a variety of factors. Pre-med requirements are the same everywhere, and you can get a good MCAT score from any of the schools you mentioned. But the universities mentioned have different atmospheres and experiences. CU-Boulder is a big public flagship; University of Wyoming is too, but in a more isolated geographic area. CU-Denver is a commuter campus in a large city. Creighton is going to be an interesting experience - a residential/traditional campus, a small-to-medium student body and Division I sports. Not that you can’t be interested in more than one kind of experience (I encourage it!) but think about where you want to spend the next four years? Med school isn’t the entire purpose of college, and many, many med students change their minds or don’t get into med school. If you, for whatever reason, didn’t go to med school after college - where would you rather have gone?
As a CO student, CU-Boulder and Colorado State are both likely to be less expensive than University of Wyoming, even with WUE tuition. So those would probably both be better deals than Wyo.