I've heard of about 5% of the bands playing this thing. Some great one ones, but not many others I know of.
Based on the number of artists that I've heard of, the cost is far, far more than I'd be willing to pay.
That’s the whole point of these gatherings; besides being a destination event like a vacation, the way they are curated, based on the familiar(which is an eclectic mix in itself), you get exposed to emerging and unexepected artists in similar realms, to expand your listening and get out of any musical ruts or cocoons you might be in. Plus it’s often an opportunity to experience those who don’t perform live much, in a setting that’s respectful to musician and audience,
or to experience rare collaborations. For example, guitarist Mary Halvorson, who I’ve heard great things from and about, is playing in a few different ensembles, as well as Frisell, who I’ve been a fan of for almost 40 years.
I learned about the fest from a neighbor who is deeply into the ECM label, as was I in the 70’s; last year there was a reunion of sorts of many of their legacy artists, some of whom rarely play out any more. I’ve never had a chance to see Marc Ribot, and just the fact that the Sun Ra organization is still going is amazing; I would never pass on an opportunity(if possible)to see that although I saw them twice when he was still alive(one time they even used my bass amp). There was a time I didn’t know jack about Bob Wills, but I saw the surviving(at the time)Texas Playboys out of curiosity, and became a fan.
What you do beforehand is to sample what’s on the lineup roster, there may be some pleasant surprises, and some revelations, and you’re the more wiser for it. As with all festivals, there will be less appealing acts. But new music should not be something to be afraid of.