We are going to Disneyland on Thursday of President's Day week (single day trip) with two other families. We will have about 15 people total (depending on whether my parents come or not). Will we be able to set a group of 15 people for MaxPass to get fastpasses (I am not sure if there is a maximum number to manage for the system)? MaxPass is new to us since our last trip to DL was a few years ago! Thanks in advance!