Often go there on family holidays, taken the bikes 3 out of 5 times now. When we went we found there to be a lot of great trails, only problem was actually finding them, and once you have found them, you could be going along fine, then all of a sudden the path would end. Which did get quite annoying at times. We found the bikes very useful for just going around the lanes to the beach, shops etc… I know there is some amazing trails, but it is just finding them, going with Saddle Skedaddle would make it very worth while. I’d do that!
Don’t know how you were going over, but we took the ferry and car, from Plymouth to Santandair. That proved to be very sucessfull!