I am pretty sure the only place you can get bottles is at their two locations. I have never seen anything from them in stores.
Unless the brewery has started bottling more of their stuff in their new brewery (and I have not heard anything like that yet) the only bottles are at brewery release parties that are typically summer and winter solstice parties. I think some bottles usually are leftover for a few days after these parties, but nothing else between those releases, and no distro.
Yeah they haven't started bottling any of the core line-up yet, was at the Clinton location on Saturday and they said they're waiting approvals to hook up the bottling line. Bottles of beer have been pretty much special events, mead was typically released more regularily, they always have some different wines available to take home. Got a bottle of a Salted Caramel dessert wine when I was last there.
I have bought bottles in a local store. The supply is very sporadic. The best bet is to go to the source(s).
Recently? They used to have a small amount distributed locally, years back, but it's been a forever and a day since I've seen a bottle from them in a store near my area (Oakland/Macomb). For the OP, their Summer Solstice event is coming up two weekends from now on June 24th/25th. They briefly announced that there will be a bottle release that Saturday but details are pretty much unknown as of right now.
It was years back when I bought a couple at Pine Ridge. Saw some since but I didn't buy, but that was a couple of years back. My travel has increased, my Homebrewing has increased or stayed the same, and a good multi tape and brewery have opened in my town, I haven't bought too much in the last couple of years. I said sporadic, but my buying habits have become infrequent.