I also did a self guided tour with Iron Donkey. I rode the Connemara region in Western Ireland... a wonderful experience... it is GREAT having that luggage transfer... especially since I went on to Scotland, France for the final day of last years Tour and then to England!
All I had to carry was some food, my camera and a pair of sneakers I could put on for walking thru ruins and sightseeing! Tony does a great job of it and is incredibly personable!
If you do go and need directions look for a mailman!!! They give the best directions should ya get turned around...
There is a fine line between "hobby" and "mental illness".