I am an experienced solo traveler and usually prefer to take trains for day trips whenever possible (Paris to Champagne, Naples to Sorrento, Sorrento to Paestum, etc). Since I am solo and don't drive a stick shift it doesn't make sense for me to rent a car. I enjoy Viator's tours but get car sick. Looking at the logistics of train travel in Ireland I am wondering what makes more sense for my 6 day/7 night trip:
Option A) Direct tours to/from Dublin which usually means all day on a bus/van.
Option B) Train to a main city like Killarney, Galway, Belfast and then catch a tour (often with a tight departure timetable)
Option C) Break up my stay in Dublin with a couple nights in another hub city, getting there by train but staying a night or two. If I took option C what city and tours do you suggest. I want to see the Giant's Causeway but I am not sure all day on the bus is worth it. Taking the train to Belfast means I still have to get a tour to the coast.
I fly in and out of Dublin so it makes sense to bookend nights in Dublin on both ends of my trip. I should also mention that Ireland is the second half of a longer trip that includes Iceland and Belgium. Obviously, it is not ideal to have to pack and move every day.