Ryounkaku is the best hotel to stay at in the area of Tokachi or Furano Dake. It is the highest Hotel in the park and has amazing views from the outdoor hotsprings. The only thing friendlier than the workers is the dog that greets the guests. If you are on a day trip or are camping you can just enjoy the hotsprings for a few hundred Yen.
their webpage is www.ryounkaku.com.
It is in Japanese, but you can look at the pictures to get a feel of the place.
If you cant read japanese, you can book a room there by contacting Luke,
Prices and photos coming soon...