Hello Judy. We went to Disney on our way home from Spain,really as a "reccy" for my daughter who was going there later with her caravan. We bought our tickets from the Caravan Club along with our ferry tickets/Red Pennant etc in February (we went to Disney in June).When we got to Disney, they would not accept our tickets as they had altered them, so we had to queue and swap(no charge).
If you do buy your tickets there, you will have to queue for the tickets and then queue again to get in(actually its "all queue").I think its best to buy your tickets here but leave it as late as possible. Check the Disney web-site, as sometimes they have offers.Get there early as the carpark is HUGE and you could be a long way from the resort.I would take all food in a rucsac and hire a "left-luggage" locker inside the park cos the food to buy is expensive and, to go back to the car could take a long time.Personally, I would not go again but my daughter and kids loved it and hope to go back.