Hi Dot:

That looks like a doable itinerary and if you are riding in Dingle, 3 nights there would be good. Otherwise, as beautiful as Dingle is, it is compact and for an overview of the west, there is more to see FROM Kenmare than from Dingle. I would put the three night stay in Kenmare usually. Then again, If you stay at The Shores in Castlegregory, three nights is a good option.

Do either Ennis or Bunratty. Don't stay one night in each. They are close together and connected by one of the very few good roads  in the west. Bunratty is closer to the airport. Ennis is more of a real town while Bunratty is sort of a B&B village with some pretty solid tourist activities attached - Castle, folk park etc.

Hope this helps.

Bill