I grew up in Pennsylvania Dutch country, and I remember visiting an Amish-run restaurant that featured Pennsylvania Dutch foods, like scrapple. They did have electricity and modern refrigeration, mostly because of health department regulations, but they made everything from scratch. It was a wonderful place to visit, and there was a farmers' market nearby where other Amish or Mennonite families sold homemade products.
My mother's maiden name was Stouffer, so I have often wondered if her father's family was Pennsylvania Dutch or not. That part of western Pennsylvania definitely has a different accent than the rest of the area.