Young vs. old, contemporary vs. traditional. For once, varying camps can have the best of both worlds. For all that jazz and more, fans can trek down to "Jazz on the Hill '97" at Oregon Ridge on Saturday. Local musicians and vocalists will be on stage early in the day. Next, some of the most stellar "traditional" jazz performers from the Baltimore and Washington area will take the stage. As the day progresses, more "contemporary" jazz acts will perform. The culmination will be a performance by 4 PM, a group of international recording artists who will entertain with songs from their new album, "A Light in the Dark." In addition to 4 PM, the day of music will include Kim Waters, State of Affairz, Karen Goldberg, the Tom Lagana and Bill Boublitz Trio and the Victor Divoskin Quartet.