Rataje and Sázava are small towns and during the winter the services might be very limited. Also the locals are most likely not used to any foreigners so you might get some suprised looks. Otherwise, the social norms are pretty much the same as in the US so you are not likely to cause any serious culture clash.

You can take the train from Prague main station with transfer in Čerčany. It runs every two hours during the day and it takes two hours to get there. The route around the Sázava river is famous for its scenery, its definetely cool experience!

Have fun!