We flew into Munich, traveled by Train to Austria and returned to the US via Munich. We had no issues other than US Customs wanted to review the food items we were importing and declared. We knew that when we bought the Austrian chocolate and it took maybe an extra 5 minutes to go through the Agriculture lane for customs.
I did burn a DVD of my pictures as a backup, more in case the laptop was stollen than if US Customs wanted to retain the laptop.
Get over the paranoia and go see the world.