from what I've heard, they will not shuttle daily

from what I've heard, they will not shuttle daily . . . instead, they will go over with the certification team and others, spend two or three days, and return . . . . but they'll either save a night for all of them in the hotel each week by going over early in the morning (saving the night before in hotel) and/or return in the evening after a hard day at work, when they would otherwise stay in the hotel . . . . because it is easier and less stressful than dealing with driving to Detroit Metro to wait in lines, go through TSA, possibly have delays, etc . . . .