It’s my belief that learning scales is an important part of becoming proficient on an instrument. Will the All-State Band repertoire be in the keys of Concert Bb, Eb and F exclusively? If the decision is to make the audition scales pre-determined, then they’d better be memorized. How uncertain are the scales when they get to play them with a scale sheet? I’m ok with having each section play the same scales, but keep it secret until they come in to audition. That way, kids still have to learn all the major scales and you compare apples to apples.
That’s my two cents worth,