After a lot of tinkering this is what I've come up with.
Land in Dublin Travel to Cliffs of Moehr; find place to overnight
See Cliffs; Rest of Day free
Travel to Dublin, Flyout in the evening
CAN NOT add more days, fly in / out of anywhere else, miss the Cliffs
ARE INTERESTED in seeing any of the following: the countryside, a castle, natural views
Flight leaves 1900 on Day 4, give us entire day to drive back to Dublin, return the car, and handle the airport
Will be there in October not sure how the weather will be
1. Can anyone recommend a nice B&B type place near the Cliffs of Moher?
2. Any idea on what to see on the uncommitted time?
3. What is the drive from Dublin to the Cliffs like? Is it mostly highway?