Hey Guest- Try "Down to the River (or Valley)". It's a great old time tune. I know there is a plethora of versions available on the DT. Maybe someone smarter than I could link all the other ones to this thread.
Lacking that, just go up to the search box on the top left of the Mudcat Forum Discussion page and put in "Down to the River". Voila!

I hope you have a wonderful service and I look forward to seeing what others direct you toward as I am a music teacher for a Christian Homeschool Co-operative.