As for track time split... no, we probably don't need a full 30 minute session to qual, but 15 minutes at Mid-O sounds pretty darn short! I'd prefer one of the middle two options, 20-25 minutes. For Sunday, definitely bias towards the latter two options; while it really helped me last year, the qualifying race shouldn't be as long as the main event, now, should it?
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I guess I'd be ok if we went with a 25/35 minute split on Saturday and a 20/40 minute split on Sunday. That would give a little more time to the "out of towners" on Saturday morning to get a good lap. You shouldn't need that long though - 3 laps, done. :P Then that would also make Sunday afternoon's race the longest and most ballertastic.

Last year I was lucky enough ( ) to get to watch the Sunday afternoon races from the grandstand and afterwards, I would've been mad if I was in either of those run groups and had to miss watching the other. They were both great races to watch, in every class.