Mapping a New Lake

[WallStreetAmigo]

Many of the lakes I fish have either no available paper maps or very rudimentary ones with little detail. This problem is only compounded by the fact that many of these lakes are no power motor restricted (no gas or electric motors).

I currently do not own a depthfinder and/or GPS unit nor do I really understand exactly what can be done with them.

Two questions:

1) Given these constraints, what would be the best strategy for mapping these lakes out myself?

2) Is it possible to use a depthfinder/GPS unit to build my own map?

Thanks for the input. I know very little about the technology that is available. I do know that it would be extremely unlikely to find map modules for any product that would have my lakes included.