Dh & I did a 12 night bed & breakfast tour of Ireland for our honeymoon in 1995 so the details are a bit fuzzy. It was early Oct when we went so no summer crowds at all. We had a rental car which in itself was quite an adventure. The B&B part was through Brendan Tours. They provided a coupon book and any B&B that displayed the Irish Tourist Board logo (shamrock) would accept the vouchers.
It also included a rental car which of course is a stick shift and was around $400 to upgrade to an automatic which was a good thing because driving on the left was a bit hard to get used to. I don't know that I'd be so adventurous at my current age.
It was great that it was off season because we were so busy planning the wedding, we didn't plan much for the honeymoon as far as making reservations. We drove until it started getting late, after dinner, and would find a place to stop. We did have a scheduled stay at Dromoland Castle for our last night which was beautiful.
We arrived in Shannon from Boston with Aer Lingus, and visited Adare Manor, Killarney (took a horse & carriage ride there) then drove the Ring of Kerry, over to Cork, Waterford (toured the crystal factory) Blarney then Dublin.
We were supposed to have a quick flight to England for 2 nts as dh wanted to see Stonehenge but we cancelled our flight last minute to spend more time in Ireland.
We stopped by Ashford Castle for a quick look and was so amazed

we just had to spend a night so we wasted a voucher for such a great opportunity. Once they heard it was our honeymoon they upgraded us to this incredible suite, stairs leading up with prob 12' ceilings, large fancy canopy bed, full wall fireplace, bathroom almost the size of a regular hotel room. We were blown away.

I can't say the name of the town because it's our last name but we went there too to visit the Abbey and stand next to the sign that said "Welcome to ______". That was fun too. Then 2 nights in Galway which we enjoyed too. We did visit the Cliffs of Mohr which were just breathtaking.
We didn't tour Dublin at all and sounds crazy but this was pre-internet, pre-GPS days. Traffic was crazy as we got closer to Dublin then once we got to the one way streets and trying to follow maps, etc. We got so lost & frustrated. It was so much easier driving out in the country where our slowness didn't hold anyone back. We were somewhat on a budget and should have looked into tours that would take us from the countryside into Dublin for a city tour and transfer back. That's my one regret.
We have 2 teenage boys and I'd love to return but
1. my ds17 is such a picky eater. I had a hard time and he's worse than me. He'd probably survive on bread and potatoes the whole time.

The food was really pretty bad though I've heard it's improved. I do remember one of the offerings in the dining room at Ashford was kidney pie.
2. My allergies were really bad while I was there. I assumed it was high mold levels due to all the rain. The first day it was so bad my throat was feeling really tight and I realized with all the jet lag I hadn't taken my allergy medicine. Not a huge deal but my allergies are worse now and it's a struggle to keep them under control. I feel like I'd wake a sleeping giant.
I've been keeping this in my favorites just in case...
http://www.chooseacottage.co.uk/END/
hth