If you are based out of Big Sky, MT then just up the road you will find West Yellowstone and Island Park/Raynolds Pass. There are a number of fine park-n-ride spots in that area. Btw, don't be kiting along the highway in Yellowstone Park. That spot, on the way to West Yellowstone (at the Big Horn trailhead), was shut down by the Park Service two years ago...
Stay tuned to here or Montanakitesports forum when you visit and you will know where the locals are riding. See ya out there,
Noah