It's a bit late for the original question but just for info, we took a European 2-pin adaptor and it was no good ! You will need the American style 2 flat-pin adaptor.
According to the brochure there are no hairdryers in the cabins on Island Escape only on Island Star, which I am travelling on in June. The brochure states that hairdryers are available on Island Escape for a small deposit subject to availability.
There were no hairdryers in the cabins on the Island Escape when we stayed on her, also, you are not supposed to use your own as the electricity supply in the cabin wouldn't take the amperage.
Unfortunately no hairdryers supplied in cabins and not to use your own. When are you travelling as we are also going in Jun.
June 5th till 19t.
We will be there from 5th-12th! Incidentally, we travelled on Escape before and husband reminded me that I did use a small travel hairdryer dual voltage with a European plug I think it was. Also read a review elsewhere and writer had done the same. Can only see in booklet not to bring irons. Let us know if you would like to meet up for a drink onboard.
That would be nice than.