Barry Elkington has produced superb, highly readable and nicely illustrated advice for those planning each of the colour-coded courses:
Thanks to Barry Elkington.
Purple Pen is the club's course planning software of choice and a really useful tool. It's also free to download.
Paul Taunton of North Glos OC has produced a lively and instructive document that was originally used as a presentation but still reads very well (Nov 2018)