Just to be clear, you can certainly board the DME bus to your resort (only need your reservation number to checkin). However, without advance booking, you won't be mailed the DME packet that contains the luggage tags for resort delivery. You can either claim the bags yourself from the carousel and bring them with you on the bus, or I've read luggage might be able to be pulled/identified using your airline bag check tags (YMMV).
Congratulations and wish your grandson Good Luck in his playoffs. That's not TMI, that's fantastic information!