Contour Elite is a fantastic planning tool. I love it for scouting new lakes, and helping me pinpoint productive locations on lakes I'm more familiar with.

Contour Elite offers a free trial period, I believe it's 14 days, during which you can download and test drive the software (for one lake in MN) at no cost. If you like it, then you can pony up and enjoy one of the full versions indefinitely. Here's the link to the free trial offer:

Trial