The map will include some urban terrain around the Haywards interchange, and some bush singletrack in Keith George Reserve. If you haven't ridden these before (or only on a night ride:-)) then it will be useful nav practise - and likewise for the paths over and under the interchange. There may or may not be markers out, but if you RSVP by the Friday prior there will be a map for you. No entry fee.
Edit - a draft course is 14km measured as ridden. There's a shortcut which makes a 10km course, and also an easy-rider 5km option.