We had a great stay in Volcano. Our GPS was not completely accurate (flipping) but we found the right house without any problems. The night sky is amazing (in case you see more than clouds) and the accommodation is very comfy. You can watch Netflix :), there is a big nice shower, if you feel cold you can turn on the heater, there is a fridge, waterkettle, microwave, ...
It takes 5 minutes to drive to the entrance of the national park. We have been here for a week and couldn't find a better place near the park.
Arttie is a super host - We highly recommend staying here.