It is really neat to see what all these places look like.
I think you mentioned that you got cards at all of the places you visited. Your mailbox should be swimming in offers pretty soon.
I'd be interested to hear how they compare to your local offers and to each other. My greater interest would be the southern Ohio, Indiana and Illinois casinos specifically, but . My experience with play at out-of-area locals has been that the return offers are disproportionately high, since zip code I think factors into the calculation, but it really varies. This has worked to my advantage when I have repetitive travel to the same location to actually use them.
I also find it entertaining how long places will continue to send offers....the one off places not the CETs or other chain casino card groups. For most it's a few months and then nothing except for perhaps a periodic postcard. Others keep sending things for years.