Hello Dana,
I have good reason to believe your Gfell and Schwäble families come from Grissheim/Grißheim, Freiburg, Baden. I am directly descended from the Schwaebles but WAY back there.
Anton Schwäble and Salome Gfell were married 22 Nov 1841 in Grissheim. Anton's parents are listed as Anton and Marianna Schwäble and Salome's parents are Fidolinus Gfell and Maria Anna Schmidt.
A great place to look is here:
http://www.online-ofb.de/grissheim/index_en.html