I don't see why not. There probably aren't a lot of rides you'd need to do that on, though. Last year when we went, we had a 2 yo who couldn't go on a lot of the rides. So DH stayed with him while I went on the ride with our older 2 kids (11 and 6 at the time) and then the two kids both went on again with DH while I stayed with DS2. I'm trying to think of rides that only fit 2 to a seat where we had to switch off and can't at the moment... Anyway, if you need to switch off, most rides simply give you a ticket to bring to the fast pass line for each rider. So you'd need each rider at the line to get the tickets from the CM and they aren't going to care who is holding the ticket when you go to get on the ride.