Brian - there is some really good advice mixed in this discussion. I make it to Ireland as often as I possibly can. Reread everyone's advice several times.
- Driving - highly likely you will get a flat tire at some point, check rental car spare tire, jack, and wrench before you take off. Hug the center line when you are driving and inch over when a car is coming in your direction
- Food - it has gotten a lot better over the years, fish is really good, don't plan on premium steaks/burgers
- Drink - The Redbreast duty free recommendation is excellent. But in order to enjoy the golf, don't go stupid on the drink, mix in lots of water.
- Golf - if you are playing 9 days, I recommend taking pull carts, it will make your last several rounds much more enjoyable. My testosterone level fought this for years, but I have since learned on long golf trips, I enjoy the end of the trip much better by putting my bag carrying ego aside.
- Courses - screw your handicap, have fun. You will take X's on holes. The style of golf and visual dynamic is much different than parkland golf in the U.S. You will often have a hard time finding the right spot to aim. Soak up the little nuances and details as they will be a large part of the memories. As for a course list, if it is seaside in Ireland, you almost can't go wrong.
- Sight Seeing - Rick Steve's books are some of the best. Pick one up, and give yourself a little time to see some of the local stuff. It is well worth it. If you want a list of recommendations based on where you will be, send me a P.M. I know this is blasphemous here, but there are a few spots that I would even skip a day of golf in order to soak up. But I didn't learn about some until after 5 or 6 trips.
Enjoy!
Shane