You have several options.
1. tag your bags. pack anything you will need for the night and first thing the next morning in your carry on bags. Then, when you get to the resort, tell Luggage Assistance that you want your checked bags held until the next morning. Tell the front desk the same thing. When you get to your room, hang out the 'privacy please' sign on your room door. When you wake up, the message button on your phone will be blinking, with a message telling you your bags are there. Call down and have them brought to the room.
2. Don't tag the bags, and get them yourselves at baggage claim. Take them to the bus with you, and the driver will stow them beneath your bus. The driver will expect a tip for 'luggage handling'. When you get to the resort, there should be someone to help you with your bags...and get them to your room. And they will expect to be tipped as well.
3. Tag the bags and wait up for them. If the flight lands on-time, at 9:00, you should be at POR around 10:15-10:30. Which means you can expect your bags to arrive any time up to about 1:30am!!!! Probably sooner, but that's not etched in stone.