Just a short PSA....
If anyone will be on a driving trip in late May or early June, and you happen to be close to Cahir, Cashel, or even Cork, I strongly suggest visiting The Vee in co. Tipperary. During that time of year the entire area is filled with blooming rhododendron...we were there last June and it's one of the most spectacular sites we've ever seen. There's a proper car park near the top, and a nice foot path down to the lake. There's also a smaller car park at the bottom, but you have to negotiate a steep walk up to the lake (but you'll still want to stop there to get great shots of the valley.) Here's a video: https://www.youtube.com/watch?v=7D-z61RTN1c
Very few people even know about this place. Just thought I'd pass this along.
-Russ