Yes, I've heard of Lost Lands, but I've never been. I did however go to Excision's Reunion festival during the summer of 2021, which was held at the exact same location as Lost Lands and was basically just a smaller version of it.
Here's a post I did about it. https://peakd.com/hive-164853/@daltono/bsaayeiv
I personally haven't been either, but I definitely want to check it out! Oh, that's awesome! I didn't realize they even had that, but I'll have to check it out and see if there are some smaller venues like it close by!