Revo has you on the right track. I don't fish the Missouri side much, but the few times I have, the James Reed Lakes have been easily accessible and easy to pattern for bass.
Do you own waders? If you do, good fishing can be had at any of the larger KS/MO metro lakes, especially in the spring or fall. Top lakes on my <20 mile list include: shawnee mission park, kill creek, lake olathe, cedar creek, gardner city lake (LMB virus impacted big fish the past couple of years), Lake Lenexa, longview, and the previously mentioned JAR ponds. All will provide good LMB opportunities. My goal is to catch some hybrids out of Blue Springs Lake this spring!
That's a pretty good starting point. Good luck!