Isabella, Phineas, and the Autograph

Isabella, Phineas, and the Autograph is a future fanon taking place after the events of Isabella and the Sign of the Moon. When the Flynn-Fletchers take a trip to Disneyland in California, they are allowed to bring one guest, and though Phineas protests, Isabella is chosen. Isabella is really happy that she can go to Disneyland, but her aunt Odessa tells her to give her an autograph from Mickey Mouse himself. Can Phineas finally realise how he feels about Isabella? Will Candace tell anyone why she's so depressed? Can Isabella get that autograph?