Many resources exist to aid mapping waterbodies.  The Aquatic Nuisance Control program has compiled a list of resources for your information.

Location Maps:
http://www.mapquest.com
http://www.mappoint.msn.com

Lake Maps:
http://www.mcgi.state.mi.us/mrbis/ (includes information on public access sites)
http://www.michigan.gov/dnr/0,1607,7-153-30301_31431_32340---,00.html

Topographic Maps:
http://www.topozone.com
http://www.michigan.gov/cgi (select, MI Map Gallery, Map Store)

Aerial Photographs:
http://www.terraserver-usa.com/address.aspx
http://www.aerialgraphics.com
http://ims.gvmc-regis.org:1052/website/public (select Parcel Finder) - For Kent and Ottawa Counties Only
http://www.michigan.gov/dnr (select Publications and Maps)

Map Books:
100 Lake Maps Featuring Contours and Depths - Bright Spot Maps 219-324-3324
Sportsman's Connection Fishing Map Guides - Sportsman's Connection 800-777-7461 or http://www.sportsmansconnection.com
Michigan Map Catalog - Michigan United Conservation Clubs 800-777-6720 (discontinued - limited supplies remain)
Michigan Plat Maps