Don't forget it never hurts to ask at the port for a paid upgrade. On our 7 day western I was able to go from a Category 9 to a Category 4 for 365 dollars FAR less than purchasing it originally! That was supposed to be the price to go from 9 to 5 but the woman said they needed 5's, how about a 4!
I couldn't get my credit card out fast enough!