Yep, this is the famous TARP LINE.
On the Planet Bluegrass site, go to Rocky Grass, then Info, then Guidelines, scroll down to Tarp Line Policy.
www.bluegrass.com/rockygrass/rules.htmlThe rules say the line starts at midnight, but I've noticed people start lining up at 11:00. The line forms on the path and PB wants to make sure it doesn't form while people are trying to leave after the last show.
On average, the numbers are handed out sometime between 12:30 and 2 am. Although, one time it was 3:30.
People with numbers are first into the festival grounds and are allowed to take in one tarp to stake their spot for the day.