Harry Potter and the Deathly Hallows: Part 1 When hiding from powerful evil wizards who are searching high and low for you using every resource they can muster, your best bet is to remain in an island nation which is smaller than the state of Florida. (0) Comments
Muse: Actually, Ron and Harry are over 17 now, so the trace no longer works on them. Not sure if they mentioned that in the movie, but once the trace is gone the Ministry has no way of tracking you if you break the law with magic.
Otherwise there'd be a lot of unregistered Animagi rotting in Azkaban.
Hermione is the only one that earned her apparating license. If Ron or Harry apparated I'm pretty sure that the Ministry of Magic would know and therefore be able to find them. Of course the film fails to mention this even though it was in the book.