My wife and I are planning a trip to Ulster for sometime at the end of September/beginning October of this year. We'll be arriving in Dublin and would have about 12 days. The plan is to start in Belfast and drive the Causway Coastal Route, stopping for the sites, to Londonderry and from there, make our way down to some sites in Donegal, possibly up the Inishowen penninsula, and then down through the Lough Erne and Enniskillen area. I was wondering what the best strategy would be for a car rental. For instance, would it be a good idea to just get the car at Dublin airport and keep it roundtrip to return it at Dublin airport? Versus something like taking a train to Belfast, hiring the car there, and returning it elsewhere and taking a train back to Dublin airport... We'd be arriving and leaving from Dublin airport. Thanks!