Untill the last year or so, all my fishing was done around the Porthmadog area mate, give Porthmadog a miss, drive to Borth y Gest and fish off the old machine gun turret (nice n flat, and not to far walking from the motor), failing that, drive for another 15 minutes and fish Criccieth, that beach is at its best in the dark (keep the castle on your left).
Good luck, maybe give me a pm when your planing going and I'll tag along !