Chris,
I have the Lakemaster Contour Pro software and it will serve the exact purpose you are looking for, prefishing from the computer. I has the same awesome details as the map chip but much easier to use on the computer. I also transfer my waypoints from my boat electronics onto the computer so it serves as a waypoint management software also. I highly recommend it. I will mark the inside/outside turns, points and break’s as waypoints on the software and then transfer them via SD card to my boat electronics which really cuts down search time on the water.
Note: I also have Navionics Explorer software for computer and although it does have more lakes from SD, ND, IA, etc the details are not even close to the Lakemaster product.