Not surprised, lovely cycling country, we were down in Bude last week for the National 25 and whilst there I went out with an informal group from Bude, kind of a CTC type group and very friendly. According to Neil who was leading there are no clubs or groups he knows of in the area, he thought the terrain puts off newbies and I can totally understand that. Anyway he is the local Sustrans Officer for that area, his full name I think is Neil Hutson, I'm sure you would be able to find out easily enough. Worth it, I had a cracking ride and aim to go out with them again later this year.
Hope that is of some use.