I just returned from 3 weeks in Denmark, Sweden and Norway. If you want out-of-the-way, I recommend looking at a hotel in the mountains above Flam, Norway. The hotel is the Vatnahalsen Hoyfjellshotell near the Myrdal train station.
This hotel is not fancy, but very comfortable. Breakfast is included and dinner is available. A good thing as you can only reach the hotel by the Flam Railway or walking.
From this hotel you can hike several trails, including a 1.5 mile walk to the valley that has about 19 switchbacks. The valley trail ends in Flam, about another 12 miles. Can also hike along a beautiful lake or ask the manager who can provide tips about off-trail hikes in the area. This is a very popular mountain biking area. The hotel rents bikes.
The weather could be spotty in your time frame, we did have a day and a half of rain in July. You can reserve a room and see how the weather looks.
We also rented a car in Kalmar, Sweden and drove (about one hour) to the glass blowing region around Kosta. It discussed the Rick Steves' book. We rented from the European company SIXT. The manager met us at the Kalmar train station and we dropped it off at the airport. Very easy. The area around Kosta is heavily forested with many lakes and rivers. The traffic was light and the signs were helpful.