From experinece the roads will be full of lost holiday makers not looking where they are going and frustrated locals doing warp 9 down narrow country lanes in cars with no ABS and probably a wiff of an MOT so venture onto the roads at your own risk! However these chaps maybe able to help out with off road stuff.
Dept 26
They have a few video's on you tube. I think most of the trails are a little bit north of Bude but last time I was there I did notice a promising bit of forest a bit inland on the A3079.
There is loads of good walking in the area, get a good OS map and take a walk from Millook to Crackinton along the cliff path, there are a couple of steep paths down to rocky beaches "The Strangles" south of Crackington Haven is a good challenge. Other good beaches are Sandymouth (Nat trust parking so expensive if its only a short stay) and Duckpool which is free.