I would think that the hotel would store your luggage, and may even have a room. Hope that your flight is not delayed, and you can get to the hotel quickly .....

Best is to e mail and ask if you can have an early foc check in ( I have no idea on your status - if any ) but mentioning your status will help.

I have only stayed once, but found the FO staff very helpful and attentive. ( I have Gold status btw )