We are planning to visit Germany for the Christmas Markets for our 2nd time in 4 years. My health has declined and I am now on an portable oxygen concentrator. Walking distances is difficult. We have our itinerary laid our and plan to avoid the hillier Markets. We are thinking maybe a transport/portable wheelchair might be the answer. Does anyone have experience renting one in the Frankfurt Airport? Our base is Morbach which is a small town which might not have medical equipment. Any help is appreciated. We look forward to our visit!