While they may not fit in a suitcase, they will fit in rifle cases.
As long as they're in the trunk seperated from where someone says they are "easily accessable" by the passengers, you should be fine.
But read the site G35 provided a link to. A trip that long can find you going from "Howdy fella" to "Wanted felon" just by going over the border.
Pittsburgh Pirates- 1st place NL Central 7/15/11
They've got us surrounded? Good. Now we can fire in any direction, those bastards wont get away this time
An amateur will train until they get it right. A professional will train until they can't get it wrong.