Unfortunately, I am not familiar with the cities you are visiting...so I can not speak specifically to each one.
However, I can say generally, you will need to research each individual municipality to determine what they do/don't allow as to OC. MO is OC friendly, but municipalities can/do regulate if OC is permissible or not.
There are a couple of good websites that can help: SullivanPublications, & Municode. These are just a start. If there are no restrictions located in the electronic codes, you still may want to contact the city to verify they haven't passed anything in the recent past that changes it.
Hope this helps and doesn't discourage.
Hopefully some folks that are familiar with your areas will chime in soon and give some local confirmation.