Must plays: Ballybunion Old, Lahinch, Ballybunion Cashen
Fun: Dooks
Overrated: Everything else south of Ballybunion!
Given the late date, you'll need to show some flexibility to get on Ballybunion Old (be sure & play the Cashen while you're there). You're probably better off playing the lesser known courses further north - Carne, Enniscrone, County Sligo - easier to get on & better courses to boot.