Hi Pilgrim - Welcome, you're gonna love Rockygrass.
I will also be setting up a sun-shade for the family "base camp". Yes, there is a line about two-thirds back that marks where sun shades are allowed. I usually get in line early to try to get towards the front of the sun shades. So I've always been able to put mine up somewhere. I don't know if there are people that arrive later that are unable to find a place to put there shade up. But it does get pretty packed in there for Rockygrass.
I guess if you really care about having the best possible view from your shade tent, then you should get in line early. Sometimes I've set up behind so many tents (or tents with side panels
) that I really didn't have a stage view, but that's never been a big deal. You can still hear, and we're usually hanging up front with the kids anyway.
Good luck, Maybe I'll see ya there!