Yes apologies, just to be clear I wanted to know can you bag check hours in advance? If not then HBO would you be allowed in? I indeed can imagine a few worse things than spending the night in an airport but it shouldn't be so bad as I'll likely be wide awake during those early hours before boarding.

Thanks for the link, looks like there's some options for capsule rooms if I do start to feel at bit tired.

Looks like plenty of people have tried spending the night at HND with mixed results;