Obv. Tabby's there. She's happy to phase people through the walls if needed. She also just... you know, she has trouble staying out of trouble. So I want to say she did something to cause some sort of issue but how big it was is completely dependent on how much you do or don't want shit getting out of hand. So I will defer to you on the trouble scale before actually saying she did anything. Though, really, unless you want massive trouble she probably mostly stole kids' prizes and scared the shit out of people in the haunted house by popping through walls.
Alison can't climb for shit... but she probably insisted that she could. Loudly. And then failed miserably. She had some sort of funky hair thing going on depending on how their conversation ends up. But something to disguise her appearance.
If you wanted an amusement park that actually exists, there's Playland. So many Playland memories...