Browsing through last weeks Weirs Times, I found an interesting link to coutour maps to 250 NH lakes and Ponds (Winnipesaukee is not included). These are really cool, like this one to Lake Wentworth.
http://wildlife.state.nh.us/Fishing/..._wolfeboro.pdf
Here is the link to the rest:
http://wildlife.state.nh.us/Fishing/bathy_maps.htm
Enjoy
IG