Sorry this took so long, but it took awhile to track down the info.
As for religion, I would say Protestant. They referred to themselves as 'Free Thinkers'. As far as I know, they did not attend any church after they located in Nebraska.
I have looked at the Prague Archives for volumes that include Opolany and Libice. Many are not yet digitized. Two new villages that I found in some old documents yesterday are Kanin and Sany. I still have to check the Archives for these.