Gordon S.
Yelp
Look - you won't be visiting this place unless you are a professional astronomer. But if that's you, and you do visit, it's about as nice of an astronomical facility that you'll find.
Lots of parking - visitor parking is just outside the front door.
Facilities are large, and very, very quiet. Remote (Subaru) observing capability, and lots and lots of outstanding support.
Washrooms have a bidet - a nice "touch".
'Imiloa is a 2 min walk down the hill, with a great cafe and gift shop (7am - 4pm + dinner Thurs-Sun) and wonderful overall facility.