On the subject of nighttime qualifying - I live in east central MN, so it is a tradition to go to the Brainerd National event every year (Zoo = Woo!). Anyway, they don't have friday night qualifying - ever. I heard they didn't for two reasons: Local noise laws and the fact that they don't have the lighting for it.
After looking into it, the noise law as far as I can tell is bogus:
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From the MPCA:
No standards adopted by any state agency for limiting levels of noise in terms of sound pressure which may occur in the outdoor atmosphere shall apply to:
E. Motor vehicle race events conducted at a facility specifically designed for that purpose that was in operation on or before July 1, 1996.
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With that, why has BIR not constructed some lights, or brought in temporary lights to have a Friday night qualifying session? I thought maybe they have a light pollution law or something. Does anyone really know why they never hold Friday night sessions there?