In reply to ekinstimothy:
Sorry for the delayed reply, last week was a bit mad, partly because I had COVID, but also because of a variety of other things that were going on.
When it comes to water I asked my climbing partner, Ramon Marin, as I couldn't quite remember what the score was. There's definitely water on the island, although neither of us could quite remember where we got it from, although I'm sure someone will be able to help. We camped quite close to the harbour area, in/around some ruins, which helps to provide shelter (not that we needed it, as it was roasting whilst we were out).
The one thing it'd be worth confirming before you go is who's sailing out there. I gather that Dan (the man) isn't sailing there anymore, but that it's worth asking him anyway. If he can, great; if he can't then there's another guy around the coast who can, but that he needs to know Dan isn't keen before confirming due to some sort of gentleman's agreement that they have.
When it comes to advice, the only thing I'd say is that (at least when we were there) there was no point in even attempting to climb before the sun had hit the cliffs, because they were inconceivably greasy. For the Holy Jaysus Wall and An Sron Buttress this means leaving quite late, which isn't always ideal, as the routes there take time. Maybe we got unlucky with conditions and others will be able to advise otherwise, but in our experience it was literally impossible to climb if the sun wasn't on the cliff (and when it was it was around 5000 degrees celsius).
From what I recall, the cliffs in/around the Wild Atlantic Wall came into the sun a little sooner, so were an ideal place to warm-up before getting on the bigger stuff - if it's the bigger stuff you're after.
I wrote a long, rambling article about our trip there, of which around 2% of it covers the actual climbing, with the remaining 98% focussing on the experience of both getting there and being there.
It's an amazing place.
https://www.ukclimbing.com/articles/destinations/owey_-_the_picture_of_a_dr...