Hi,
It's great to hear you thinking of visiting Ireland. A trip along the Wild Atlantic Way sounds fantastic!
However, there currently is a self-isolation requirement when arriving to both the Republic of Ireland and Northern Ireland. Even if you are fully vaccinated, you still have to have a negative (‘not detected’) RT-PCR test for COVID-19 taken in the 72 hours before your arrival in Ireland. You must also complete a period of self-quarantine at home or in the place specified in your passenger locator form.
As you are traveling in a motorhome, in the Passenger Locator Form you should add the address of the campsite where you will do the self-isolation, while also making the campsite provider aware that you will do so.
These measures can change, so the best way to keep up with these updates and requirements is to visit the
Traveler's health article often.
Let me know if you have more questions,
David