I found they where very accommodating. They allowed us to check in early at 10:30 am so we could go to a Red Sox game.
I believe you can leave it for an hour
We had a flight late at night and we left the luggage with the hotel and checked out at 11 in the morning. We took the hotel shuttle at 8.30 pm to the airport. The hotel has a facility to leave luggage.
When I was there they allowed to do something similar not sure if it's as long as you're asking. I travel a lot and most hotels offer courtesy like that
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