My wife's cousin has a cottage on Norman, we have been there and they have been here. It is a man made lake built to accommodate a Nuclear power plant.
http://www.golakenorman.com/lakenorman/
While it was 12 years ago that we were there, my recollection is a a very warm lake with an abundance of shallow areas and large seasonal variation in level. Most docks were the floating type like seen on ocean frontage.
I'll send the cousin a note and ask for his input.