ksdog...check out some of the Conservation Lakes in Missouri. they are managed by the MDC and are usually 100 acres or so. Some are trolling motor only, some allow small gas motors.
When I lived there, I fished a lot of those lakes and they hold pretty good fish. They get a little busy sometimes but are nice lakes.
Here's a link to the MDC and you can check whick onses are closest to you
http://www.mdc.mo.gov/