The Mayo Clinic CRNA program is fantastic. The interview process is a brutal all day affair but once you are accepted, they support you the whole way. Almost all of your clinical rotations are at Mayo so no traveling and they pay you a stipend once you start your rotations. I have seen patients here that have come from all over the world to be at the Mayo Clinic for surgery.
There is no preference given to anesthesia residents simply because there is enough to go around. The faculty are great, facilities are great, and have recommended this program to friends.