Thanks very much for the replies. Will peruse the ACU calendar, particularly the off-road stuff. Doesn't really matter what we see really, it's just nice to be able to go camping with my old man once a year. (Separate tents, though, I can hear his snoring even though I'm usually 15 feet away!)
Something has clearly gone wrong in my life though - he's 75, has more points on his licence than me and rides a faster, heavier bike! (CBF1000).