To climb in Hyugami, local climbers use Green pal Hyugami, camp site.
See here for detail. It is not written in English but you can see it in google translation.
A dormtent is rented at 2800 yen.
You can rent a cottage,
A cottage for 6 people is only 17,050 yen up to 8 people,
10 people is 22,550 yen up to 12 people.
To use this place perhaps you do like to come by car, or a bus. To get to crag, you's like to use a bus or by foot.
Okuhyugami Camp site
Okuhyugami Camp site
Is opening in Feb. or Mar. in 2020. Once it is open, you can access it by car and stay there for a few days. It is only camp site within 5 min to crag. Local climbers just bring tent under the tunnel there or sleep in the ban of theirs like climbing bums.