Welcome to the gang! For your current dilemma, I would encourage you to go to www.overnightrvparking.com
and subscribe. It will cost you $24.95, and well worth it in my opinion. You type in your location and it pops up with options nearby. They even have an app you can use on your smartphone.
Here's the map of Indianapolis I just obtained from their site. The green pins are places that let you stay overnight, and each has details similar to the panel at the right. Other colors indicate "no parking" or "just Elks members" or some such.