Not sure how many are in your party and how you ae getting to the Radisson at the Port, but have you considered renting a vehicle? We are flying in on Sat (9-17) and have a vehicle reserved through Budget for only $22.00 (taxes and all), of course it is just the wife and I, so there will be a lmited amount of luggage and we opted for the cheapest rental. We pick the vehicle up when we land and then turn it in on Sunday, where they will shuttle us to Port Canaveral.
Just a thought.