Jenn,
Ditto on what Brett has mentioned here. Down at the Minneapolis Sportsman Show right now is Lake Master booth. Here they show you first hand the detail of the Mille Lacs Reel Bottom lake map software. Definately worth a visit. This software is very handy to have for importing and exporting waypoints off your gps to your PC and vice versa. Also, if a person is interested, they have this detail software maps plotted on full size physical maps now and have Mille Lacs broken up into 4 quadrant maps. (NW, NE, SW, SE) for sale.
I was informed last night that updates to lakes are free once you buy the first package.
The King Tutt is the ol reliable to have in the boat at all times. This map has considerable detail as well. This may be one to have in the boat for sure.
Good Luck