Not sure where to post this question, so I thought I start here. We will be in Berchtesgaden for 4 nights in May 2019. We want to do some day trips from there. I'd love to see both Hallstatt and St. Gilgen. Trying to figure out if this could be done in one day. According to google maps the complete drive is about 3.5 hours. So I'm wondering if about 3 hours in each location would be ok. We aren't opposed to getting an early start, but we like to be back to our room before dark. Just don't like driving in unfamiliar places once the sun sets.
Thanks so much in advance for any help with this