Rick
You can't go wrong with any of Ally's top 6 - make it 7 with Carne the highest Dunes of all..
So as you are not travelling alone, solely for golf, it may come down to proximity to the bases you choose.
So for me its
Portrush/Portstewart over Newcastle.
Lahinch over Ballybunion.
Belfast over Dublin (i know, I know...
)
Dingle over Ring of Kerry
Also if you do get to Lahinch see if you can temp your travelling companions to try a links P&P. There's one on the Road to Doolin, Sandfield House P&P, and a second through Doolin on the way to the Pier. Aim to get to them just after opening. Playing behind a family 8 ball is not much fun!
Marty There's a static site just opposite Portrush and I think at Castlerock - worth playing.
Also overlooking Ballybunion.
Not sure if they take RV tourers. Sorry can't help more.