Stopped at the Missouri visitors center just outside Joplin. It was very nice with lots of space, picnic tables and, of course, maps. We opted not to go into Joplin to see how they are doing after the tornado a couple of years ago.
I know that Missouri is supposed to be the "show me" state, but I think they are the trucking state. There is a trucking company or depot every few miles and there are a plethora of truck pull-offs on the sides of the highway. Not really rest areas like you see on highways, but just a big paved turn-out kind of thing.
We are staying tonight in Lebanon (pronounced "LE banin" as well it should be) Nice park, wooded, has a little lake and great WiFi. Only downside is it is right next to the freeway. Which really is not an issue since we are only here for one night and it is hot enough that the AC is running.