St. Gilgen, Austria

I suggest looking into a farmstay, which is very authentic and to a very high standard (with free parking) - https://www.farmholidays.com/holiday-destinations/upper-austria/salzkammergut-region?state=ooe&_ga=2.42403621.102494056.1560782909-991408469.1560782909&_gac=1.237776436.1560782909.EAIaIQobChMIgY2dtOHw4gIVz5ztCh1zAAS7EAAYASAAEgJfX_D_BwE

I spent five nights at the Hotel Hollweger, which was very comfortable if a bit full of British travellers for my tastes (but that did mean the staff all spoke perfect English - helpful if your German isn't great). It had spectacular views of the lake, a swimming pool, and, the highlight for me, its own private lake access (a little walk away from the hotel).