Thanks for the advise and tips. I did a test run on Sundays club ride and everything worked as described.
Interestingly although I've set my Etrex for metric readings the proximity setting is in fractions of a mile. I tried a variety of different distances for the proximity setting but couldn't decide which was best. Any thoughts?
Can I have a bonus bonus point for realising that if I use the info control question as the waypoint name that is what I will see on the screen to remind me what I'm looking for. So instead of Info 7, I'll name the waypoint IC7 name of pub on R after T.
Also, having plotted the control points accurately, as per Ians instructions, do I need to use some sort of amnesic process or device where this has inadvertently caused me to see the answer to the info control question