I don't know what the airport procedure for BAH, but will I be able to walk off the plane after KWI-BAH then head straight to BAH-KWI or will I have to go through immigration? Also, how do I manage to check-in for the return journey if I am never leaving the secure area? Sorry if that is obvious, but I have never done a mileage run nor been traveling for 24+ hours where check-in open up en-route. I have always been able to check-in and get my BPs prior to my first departure.