I guess you could walk, but I would not want to. I would guess it is closer to a mile than a 1/2 mile. And, that road is BUSY. At one time, budget was right at the Radisson, but they moved. They are now just a bit farther down the road.
Just think how fresh you would be for that embarkation photo if you walked!
Just an Fyi for you on the other end too, Disney upgraded their port last year, so if you are renting a car, Budget does pick you up at the port, and there is a que area for each vendor. If you are off the ship early, like we were, there was not a long wait. The porter will take you and your luggage to the que area when you tell him how you are leaving. There is plenty of room for your luggage in these vans and I WOULD recommend doing it that way instead of sending one person to pick up the car and come back.
It can also be pretty nippy early in the morning, and I would not want to have to wait outside while someone picked up the car.
Got to get to bed now - early day tomorrow. I need to go to Cleveland to see if we can negotiate a contract or not.
John