I find a picture of the flag works wonders (while in crowds)
OP..... The Cider Bus, Meeting Point, Greenpeace sign on the railway tracks, are all good spots...... someplace near the sensation seakers stage / ridge and farrow can be good when en-route to the SE corner, but the best advice I could give is have a good wander about on the Wed / Thurs and find your spot that works well for you.....