I would suggest that you do the caches in the order in which they are numbered. It may be possible to complete the series in one day, but I would highly recommend spending a few days on this wonderful island. The Zola67s go there for two weeks every summer.
It is a great place for kids, and my seven year old made it to all the cache sites. Please be careful near the cliffs..
There is one other cache on the island apart from this series - "Inishbofin Monk's Prison", so you could pick up seven caches in one trip..
Anyway, on to the first cache in the series -
The gate to the path leading to the cache can be found at:
N53° 37.584 W10° 11.461
Along the way, take time to enjoy the lake in the valley of the goats on your left, one of the most tranquil spots you'll find. Continue on and leave the path at:
N53° 37.908 W10° 11.782
Head straight for the final coordinates, posted at the top of the page. Please take extra care along the cliffs. Being terrified of heights, I hid the cache well away from the edge. The seastack was once one of the six promontory forts dotted around the island. It is now home to a colony of fulmars.