I went in 2010 and it was the most miserable experience of my life. I was in my early 20’s then. Also, drastically more expensive than you could imagine by the end of the week. I will say they did have a very nice emergency medic tent I got to visit from heat stroke, haha.
If you do attend- definitely do NOT bring a moped, invest in the best hiking shoes you can buy, and prepare for a week of no shade, no AC, miles of walking everyday, and sauna-like porta potties (bring your own TP). Also realize you’re probably only going to get to see a small fraction of the bands play.