If you're visiting Hakone, I definitely recommend Laforet Hakone Gora Yunosumika for even a night. Though it's a splurge, it was totally worth it. We slept and dined like royalty -- the rooms were so clean and hip/trendy! Our dinners were delicious and memorable, too. The staff was also extremely kind and offered lots of amenities, like shoes and yukata for using the onsen.
The public and private onsens were top notch -- and so relaxing after a week of traveling.
The hotel's located not far from some charming mom-and-pop shops and konbinis, too -- but the hotel basically has everything you might need during your stay.