I was told that I coiuld buy 3 base tickets for $216 or 4 base tickets for $225. Is this correct, that the 4th day base ticket only costs $9? If I end up staying only 3 days instead of 4, can I use the 4th day ticket to go to another park on the 3rd day? Or if I stay 4 days and buy 5 base tickets can I use the 5th day base ticket to go to 2 different parks on the 4th day? I hope I am making this question clear, it is boggling my mind. Thanks.