Mike
Curious as to what type of fare you're planning to use. When I checked there was a good USD 95.00 return DTW-FNT but it required a Sat nite stay.
Also, after reading the promo rules, it says use nwa.com e-checkin was worth 5 points. But that's 5 points for every time you use this service or 5 points for your first check in? Same idea for ticket purchase on nwa.com?
I admire your ingenuity. Just wish I lived closer to a NW hub.