I bought my tickets for Merlefest 2018, this morning. I was actually considering not going this year, because it's getting to be such a big festival, but I got an email from them this morning that said that Tommy Emmanuel would be there. That clinched it for me.
They don't yet have the stage schedules posted on their website, but if you want to check out the lineup, go to www.merlefest.org
2017 Jason Wolverton spruce/maple, 640, "Luz Blanca"
2016 Kenny Hill New World Estudio 640, cedar
2015 Kenny Hill Performance 640, C/IR