Hey there Amy!
You're going to have a wonderful dinner at
Chef Mickey's in February. I could sit there and watch the monorails pass overhead as I dine for hours. It really is a quintessential Disney experience.
Getting back to your resort after dinner will be no problem at all. You have two options. Either take the escalators from the fourth floor down to the ground floor at
Disney's Contemporary Resort, and then take a short walk to the bus stop in front of Magic Kingdom Park. Or, you could take a monorail back to Magic Kingdom Park and then board a bus back to
Disney's All-Star Movies Resort.
Since it is unlikely to be terribly hot in late February, I would rather walk to the bus stop. However, if you are concluding your meal right before the fireworks begin, board the monorail. You can get a pretty spectacular view of the fireworks over Cinderella Castle from the monorail as it glides back to Magic Kingdom Park.
Wishing you many magical memories in February,
Jill