It should take well under an hour to complete and is easy terrain, being almost stroller compatible apart from one part where two adults could lift the stroller over a small gap. It's not paved so unfortunately not compatible with unassisted wheelchairs. Bring your dog, kids or mountain bike along!
Park near the published coordinates in the carpark. Nearer to the main road at WP1 there are some information boards. Find the one titled "Misty beginnings - vibrant history".
AB: Under "Earthquake" - The earthquake occurred at A:40am on 22 May 19B1.
CD: Under "Living on the Land" - when was the butter factory established in Robertson? Answer = 18CD.
If you walk back past the published coordinates towards the far soccer field, you will see a bridge to your left, leading to the west. Go over this bridge and enjoy the stroll along the nature walk to WP2.
At WP2 is a large green sign. Count all the digits on this sign individually. For example if you saw 1, 23 and 45 on this sign, you would add 1+2+3+4+5 for an answer of 15. Note that there are four groups of numbers on this sign. Your answer will be EF.
GZ is located at:
S34 35.(C - B) (F - E) (B)
E150 35.(E x 2) (E + C - D) (A - F)
Good luck! You are looking for a camouflaged 200ml plastic container. Bring your own pen.