I just returned from long vacations with this question because I saw much less bands that what I expected to watch. When I made my plan I expected to watch at least 30 bands, and at the end I watched around 15 bands only. It was imposible for me to watch more bands because there where more things to do. Going to Wacken for beer supply, making line to take out money from the bank, going to the metal market, having fun with other people by the camping site, making line for restrooms, waiting to get my beer by the festival area stands took all my time. I'm not complaining because I had great super time in Wacken, but I'm wonder if that happened to you also.