Don't go to the wetroads website, it takes over your life. You keep having to go further and further for your next hit, or "splash" as we call them. The dissapointment you might feel when the ford you've travelled for an hour to get to is dry can be crushing!
Just say no!!
It's nowhere as simple as standing a map shop even for a hundred years and hoping to find many 'green lanes'.
You really do need to join your local TRF and become proactive with their aims before it's too late.