Wasn't bad for us DTW based either...take the last flight down in the evening and usually be back home just after noon the next day. The instructor would usually figure out who is commuting and who is local. They'd have the commuters show up first to get on their way to thier commute flights and let the locals sleep in and show up for the second half of the sim period. Worked great....right up until they started sending us to MIA, yuck!