You know it's nearly the end of summer when West Campus fills with the brassy sounds of "On Wisconsin,'' and you're nearly mowed down by sunburned young musicians, pedaling their bikes with trombones strapped to their backs. Yes, the Badger band is back for its traditional Hell Week of practices under the blazing sun. But not to its usual practice field. Normally the band practices where Walnut Street ends at Lake Mendota. But that field had turned into a swamp, thanks to years of huge construction projects nearby. Last fall, the rainy August had those poor band members marching up to their knees in mud. So, after the regular football season ended, crews dug up the practice field, and installed drainage and a sort of pavement. Rolls of Astro-turf arrived a few weeks ago, but so far they haven't been laid down. So the band is practicing about a half mile west, on the athletic fields behind the UW Waisman Center. If you want to get revved up for Opening Weekend, that's the place for your muscial fix.