I love Obertraun town the most in my recent trip to Austria. Oh need to pay cash here.
Beautiful and peaceful indeed.
Obertraunerhof offered great breakfast, a bit long walk but if you're looking for a walking trip, it is recommended. If you want to visit Hallstatt, or if you don't want to stay in crowed place, it is recommended. You could take a boat of 10-12 EUR (depends) for round trip that you can select your own pick up time. Very cool, right? The view is awesome.
Or you want to visit Hallstatt, alternative solutions are stay in Graz (hotel price is extremely cheaper) and take a train to Obertraun in the early morning, walk around the town for 1-2 hours, then take train or bus back to Hallstatt, then taking a ferry, multiple choices with better spend.
For Obertran, I didn't finish the hiking to one mountain, I could not remember the name but next time when I got back there, surely I will do it. I hope the price will go lower. It is a bit expensive but because Obertrauner is closed to Hallstatt, can't complain much, love it there ^^