Planning a day trip with my mother to the Wachau Valley in early October while staying 3 nights in Vienna. Planning to visit the Melk Monastery and 2-3 top wineries in the valley--I'm a major wine aficionado.

Any recommendations on good lunch options in the Valley, either near the Melk Monastery or near any of the following wineries:

Prager
F.X. Pichler
Nikolaihof

Anyone know of the restaurant Schlosshotel Dürnstein?

Thanks for any advice!