For our second trip, we took two days, and stayed the night in a buddhist temple, complete with meditation session and mommy vegetarian food.
We also went to the cemetery at night time, but it seems that my camera doesn't work too well in the dark. S has also written about the trip with more photos. Definitely worth returning, and I want to go back in December once it's started snowing. Then again in Spring when the cherry blossoms have bloomed. It's certainly the most stunning place I've been to so far.