In reply to sduke85:
North Wales is a fantastic place for a road trip, there are so many places to go an have fun and you would needs years to experience it all. I have been going there each year since I was young boy.
North Wales and Trad go hand in hand, but there is a huge amount of sport too. I would recommend getting a copy of "A55 Sport Climbs" -
http://www.ukclimbing.com/logbook/book.php?id=773. The A55 runs along the top of Wales next to the coast and is quite a fast road unlike the A5 at times
Not sure if you want B&B, bunkhouse, campsite? but you cant go wrong staying around Llanberis as you will also have the slate quarries on your doorstep, bouldering in the valley and easy access to the A55. Have a read at this for some inspiration if you need it.
http://www.ukclimbing.com/articles/page.php?id=3682 . Might also be worth getting a book like llanberis slate...
The weather can be temperamental at times, so might be good to plan for some activities for when you cant go outside and play. Last year we tried bounce below and it was a great laugh.
http://www.bouncebelow.net Also bear in mind the weather in the mountains can be completely different to that of the coast. So if its raining at Llanberis it might be dry at Conway
Stay safe and have fun!