Hello Catherine,
That sounds like you have a great trip planned later this year! Is it going to be your first time exploring Ireland with a campervan?
There is a lot of general information on
this website that you might find helpful for your trip planning. The
Camping Ireland website lists different caravan and camping parks, and you can see how long these will be open for. Some places might close at the end of September, while others will be open through to the end of October. Do you already have any idea of your route along the Wild Atlantic Way? If you would like to let me know which places you have in mind, I can make some suggestions for you? If you are still looking for ideas for your itinerary, you can check out these
road trips.
I am looking forward to sending you some suggestions, and if you like you can reply in German (or in English) if you prefer.
PS: Please bear in mind that wild camping is generally not allowed on the island of Ireland.