I would say go for things you can't get in Germany...so do the Elbow Falls drive and hit up Bragg Creek for a meal (there is even the Bavarian Inn if they are homesick). Then an ice cream out of that dilapidated shack on the side of the Road.
Germans seem to go Banana's for aboriginal culture...there is the
Blackfoot Crossing Centre ut I can't vouch for it having never been