I will traveling to Upper Austria late July. I have 5 days. I would like to spend one day in Salzburg and one day in Innsbrook. The other days I would like to spend in a lake town. I have read nice things about Zell am see, Hallstatt, and Wonfgangsee. I am looking for a place that I can get to easily using public transportation and has good hiking trails. I will be on my own and will need reasonable lodging.