This and other snow resorts are moving toward significant restrictions on sUAV's. Below is an example in Colorado. I have made in bold the portion of concern. I do not believe they have the authority to control airspace in the US. Drone Policy | Crested Butte "Out of safety concerns for guests, employees, and resort property, Crested Butte Mountain Resort prohibits the operation of unmanned aerial systems, or aerial drones, by the general public, including recreational users and hobbyists, without prior written authorization from the Resort. This prohibition includes drones for filming or videotaping, as well as any drone use by media or journalists operating above Crested Butte Mountain Resort property, including any drone launched off-site and subsequently flown above Resort property. Please contact Erica Mueller at 970-349-2205 if you have any questions or if you seek prior-approval to operate any aerial drones. Any authorized operation of aerial drones will be governed by Federal Aviation Administration rules and regulations, as well as policies established by Crested Butte Mountain Resort, which may include certification, training, insurance coverage, and indemnification requirements. Any violation of this policy may involve suspension of your skiing privileges, or the revocation of your season pass."