I'm living in Llangollen at the moment, there are loads of great rides near by. there is a Canal going straight through the place so maybe a nice place to warm up for half a day. The town is lovely and has lots of nice places to grab a snack or sit down for a meal and a pint(the Old Mill is a highly recommended) Llandelga is only 10 mins away and the Blue run for beginers is a good ride. Red is fun too.
I'd say the best place to camp IMO is Abbey farm. If you want a cute Hostel, llangollen hostel is bang for your buck, http://www.llangollenhostel.co.uk/
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Hope this helps adn you enjoy your stay in this AMAZING place.