If I book a package can I change the type of tickets I want (hopper, WP&More) later on? Can I add DME or Memory Maker? Can I delete Memory Maker or one day of tickets? Basically what can I change once it's booked? I know it's difficult to change dates/hotels but other than that are there issues with changing anything else? Any deadlines to be aware of for making changes or can I change right up until the final payment date?