Hi Heather,
Thanks for visiting the Disney Parks Moms Panel with your question. I really like
Disney's Coronado Springs Resort. I find that the lake is very relaxing, and I get completely immersed in the Southwestern theme. I love your plan to have breakfast at your resort. My family does this often and finds that it gets us on our way for a day in a Disney theme park earlier than if we eat at a restaurant.
I called Disney's Coronado Springs Resort to check, and
Panchito's Gifts and Sundries does sell milk. It is sold in half gallons for $2.95 plus tax, and quarts for $2.49 plus tax. They carry whole, 2%, and fat free milk in these sizes. The prices are current and are subject to change.
I hope that this information is helpful for you, Heather. Have a wonderful time planning your vacation, and please do not hesitate to ask if you have any further questions.