I know the area well, and I left my motorcycle home for the exact same reason. I don't mind the cold, but sprinkler induced ice gives me the willies. Glad you made it unscathed! (No doubt your SEEing skills helped!
I do not, for one, think that the problem was that the band was down. I think that the problem may have been, that there was a Stonehenge monument on the stage that was in danger of being crushed by a dwarf.