Hi Michael!
Welcome back to planDisney.
The easy answer is yes! Just stop by Bell Services after you have checked out of your hotel room (by 11.00 am), and ask them to store your luggage for you. I love this facility because it means we can squeeze every last minute out of our holiday, especially on our last day when our flights back to the UK are usually overnight.
The same applies on your arrival day - the usual check-in time is 3.00 pm for Disney Resort hotels - but if you arrive at
Disney's Animal Kingdom Lodge before your room is ready, you can leave your bags with Bell Services, and you can either collect your luggage from Bell Services yourself when you are ready to check-in or call them from your room. You will need to be present in your hotel room when they deliver your luggage. However early you arrive, it's always worth checking if your room is ready. If you use online check-in, you will be sent a text or email (whichever is your preferred communication) with your room number when your room is ready for you.
You mentioned in your question that you have booked all your dining reservations and will be using your Disney Dining Plan, but I have to mention how good the breakfast is at
Boma - Flavors of Africa! I hope you will find time to visit there during your stay, as it has a
delicious buffet menu.
Please come back and visit us if you have any further questions as we will be happy to help you plan your magical vacation at Walt Disney World!
Sue