Had a cottage in Betws y Coed for a week last year, was great for Ogwen (Caseg Friath is good) and the Pass. RAC boulders are good for an easy mileage session. Had the family in tow so limited to evening bouldering escapes.
Booked for just south of Caernarfon this year, close to the beach and touristy stuff for the brood but also prime for the Pass. Will make a point of getting down to Ysgo which seems to miles away from anything, and maybe some chuffing at Tremadog which is reasonably close.