Our high school bassist daughter has been invited to audition for the pre-college program at Colburn at the end of the month. She wants to take her double bass with her. I've read a little bit about this - and I've heard that some airlines even let you bring it on board. So - what airlines allow basses? (I've read that's it best to call it a cello....). Her instructor has one of those hard cases. Is it best to check it or take it onboard? Is it best to book a non-stop? And the most important question - which airlines are best???