If you had the means and wherewithwal, it is actually possible to sail up the Slaney valley from Wexford harbour all the way up to Enniscorthy. (it;s not recommended that you go beyond Enniscorthy) .
So that might a pretty cool and "off-the-wall" thing to do! :)
Just driving from Waterford back to Cork we took the coastal route and came across some splendid beaches, that were completely empty.......Excellant