A good place for the active and non-active outdoor experience. Active options are tame and good for family. Enjoying a walk in the forest and river bank is the best option. Not a place for the gourmet experience. It's a good place for a short escape from the urban stress but nothing special for foreign visitors.
Japanese traditional dinner and breakfast at the hotel, where really good. Walking around the hotel, river and mountains is really pleasant. Try the small Tofu Restaurant うめだや, it is just 15' walking distance, for lunch any of the days.