Wyo. Stat. § 31-5-1104: Duty upon colliding with unattended vehicle or property.

The driver of any vehicle which collides with or is involved in an accident with any vehicle or other property which is unattended resulting in any damage to the other vehicle or other property shall immediately stop and shall immediately either locate and notify the operator or owner of the vehicle or other property of his name, address and the registration number of the vehicle he is driving or shall attach securely in a conspicuous place in or on the vehicle or other property a written notice giving his name, address and the registration number of the vehicle he is driving. Every stop shall be made without obstructing traffic more than is necessary.