I've been twice - once in the cave & once outside - the outside concert was only their 3rd or so & it was a mess - toilets not working, rude employees (told us to go use the woods - females), & we got the worst pod in the place (maybe not the venue's fault but maybe it was) despite the fact that we had purchased tickets in artist's pre-sale in other words before most of the public). Had been on my bucket list to see one in the cave (well, when it was on my bucket list it was for the original Bluegrass Underground). Did the Cavern concert in 2019 for Scott Miller - we were near the back of seated section - concessions were up behind us so people congregated there talking. The acoustics are such that we could hardly hear the music - some friends of our's are friends with Scott & he apologized to them for a crappy show, said he was frustrated that no one made an attempt to quiet the talkers. Not easy place to get to from Knoxville, doubt I'll ever go back.