Do the long one Rob, it costs the same as the short one and you'll find it more rewarding.
Last year some of us stayed [url=http://www.activehotels.com/wl/servlet/xmlbrochure/index.do?year=2008&month=6&day=14&numnights=1&numrooms=1&language=en&batchsize=10&hotelid=118271&trkref=INF&searchcode=EURO&sortmethod=dist_alg&start=0]here[/url].
It was £85 for a twin and included breakfast. There were quite a few doing the Dragon ride (including other non-Addiscombe) staying here and they let us keep all our bikes in an unused conference room which was kept locked so keeping them safe and warm. There was a wedding do at the place which meant the disco was quite loud in the evening but a celebratory beer of two meant sleeping wasn't a problem
. Overall it was reasonable accommodation and only about 5 miles from the start so a nice little warm up to ride to the start at Pencoed College (roads are clagged solid with people driving there). Connor and a couple of others were staying at another place on the same road - [url=http://www.newinn.web.aplus.net/]here[/url].
As Amy says though book now they fill up quick.
P.S. Bridgend is a dump so don't bother to waste time getting there too early to see the town, there's nothing to see.