Happy New Year indeed, Gary!
With a flexible schedule, it would be possible to circle the coastline then follow up with the inland areas or vice-versa. You could even do some zig-zagging just to mix it up a little too!
May is a fantastic time to visit, the days are getting longer and normally less busy than the more traditional Summer months making it easier to travel around. B&B accommodation should be more readily available for those ad-hoc stays when there is so much to see, one day isn't enough. If there is something that you definitely need to be nearby, such as an event or festival, then prebooking is advisable.
We have some information on
vehicle rental that you may wish to take a look at. There are several car rental companies available on the island of Ireland. Your airline might have partnerships with rental companies too that you may like to look at. As you intend to travel in both the North and South of the island, please be sure to check any terms and conditions for insurance purposes.
There are some community post already regarding
car rental, again have a wee look and see if there is something helpful there too.
There is always plenty to think about as you plan any trip, we have some lovely
downloadable brochures too, including a Map and Route Mileage Planner that is super useful.
We are always happy to help, so please check back with us as you start to put a plan in place.
Martin