I was just in Longford a few weeks ago. It takes only about 1 1/2 to 2 hours
to drive from the Dublin airport to Longford on the N4, also known as the
Dublin-Sligo Road. Remember that Ireland is a small country and the
distances are not great. Driving on the left side of the road is a bit
strange to get used to, but not really difficult. It's definitely worth it
to rent a car and drive - call around to get the best rate. I rented from
Alamo and it was only around $40/day. As everywhere in Europe, gas is very
expensive - it'll make you appreciate the prices here in the states. Also,
keep in mind that the main roads ( such as the N4) are NOT the equivalent of
our interstates. In most cases, it will be just one lane in each direction
with a shoulder onto which you are expected to move to allow faster traffic
to pass. Although the Longford Arms looked to be a lovely hotel, there are
many B & B's in the Longford area that are much less expensive.
Have fun! And if you find any McGoeys around, let me know. I had no luck
finding any in the brief two days I was there.