i'd advise you go further down the coast for your days out, eg llandudno, conwy, anglesea, betws-y-coed, caernarfon etc.

there is also a few castles (denbigh/rhuddlan) and a water fall (dyserth) within a 15 minute drive of prestatyn if you fancy a day of less traveling.

watch out for some unmarked blue and maroon ford galaxys, and white also black volvos, especially on the a55 around colwyn bay. they have a field day in the summer. you wont find many gatsos though round here just loads for coppers swanning about in cars.