Really? this from the website... indicating a single day pass suffices...
awson Hill Campground
Requires single-day or 4-day festival pass
    Tent Camping Only
    Location: Ball field located about 4 miles from the festival grounds
    Opens: 8am on Tuesday, June 14
    Closes: noon on Monday, June 20
    Metal pans must be used under stoves to protect grass.
    Charcoal grills are not allowed.
    Tent stakes longer than 6" are prohibited to protect irrigation systems.
    Quiet hours are 2am-7am.
    Serviced by free shuttle.
    No vehicles are allowed on the field.
    Free parking nearby.
    Tickets: $60 Purchase Now
    Does NOT include a festival pass.
Lawson Hill is a baseball field located several miles west of the town of Telluride, just to the west of the Valley Floor preservation area. As this is a large open field, there is little shade, so plan to bring your own. Bring along a bike - the Telluride bike path provides a gently rolling, paved path from Lawson Hill to the town of Telluride and the festival grounds. Top

 Listening to: 
Bach