Boon Docking in Crested Butte, CO

Planning to make my first visit to Crested Butte, Colorado while en-route to Jackson, WY - any good advice on boondocking just outside of the city? Been reading about options along the Slate River - I’ve got a 4wd Sprinter (and experience driving it off road) and was looking for inside info on good ideas that isn’t too far off the beaten path. Water a plus (of course) - any suggestions much appreciated.