Schofield Barracks ranges. KR4 (80yds) and KR3 (1,700yds+). It's an Army base, access restricted to SB gun club members & guests.
staff: It's all volunteer staff, usually helpful and friendly "fellow firearms enthusiasts". No limit on how many rounds in the mag, or how fast you shoot. All Hawaii State laws apply.
facilities: minimal, primitive range, you have to be totally self-sufficient, such as shooting mat, target stands. They just provide the flat real-estate and supervised firing line where you can safely shoot. You have to pick up all your brass.