the Holz Rock is an open air over two days, 21st and 22nd July the first band is on both days at 16:00 o´clock. The festival is in a little forest the "Sengelenwäldchen" in Schopfheim. You can camping directly at the festival for free. Schopfheim is in South Germany in the near of Basel and Lörrach. One day costs 8€ and both days costs 12€.
The bands are on Saturday:

Senseless (77 Punk/ 80s HC)
Brixton Cats (Street Punk)
Inner Terrestrials (legendary from London)
Jolly And The Flytrap (Ska)

Sunday:

Seducers (Surf ´n´ Roll)
Living Things (Garage)
Tatort Toilet (77 Punk)
Distemper (Ska Punk)

No one earns something at the Festival and all the money that´s left we spend to some politican organisations.

Hope this are enough informations for you...