"The flight is longer than two hours, if you were thinking of hitchhiking in morph and pretending to have been somewhere else later instead of getting tickets and permission. Actually on reflection hitching might be a good idea regardless - put you in cargo, or on our persons to run to the bathroom every hour and a half... Then the Yeerks don't see an unusually large contingent going to visit Charlie followed by his accidental death. I don't know how much his Yeerk reports on his personal affairs to whatever organizational structure they have under the Visser, but it might be non-zero, they might notice that. Robin's convincing as an Andi-tagalong, I could maybe sell the Yeerk on Trouble too, but I don't think Ethan has ever been mentioned to Charlie at all and keeping the party small seems like the thing to do. So, Robin, ask your mom, Trouble and Ethan - make whatever excuses suit to be not-home, and wait for Robin's results on bug morphs."