If you start your journey from the given way point, you will pass by the Wied il-Ghasel Easter Cache (which was the first of the series) and after a little walk you will arrive at the GZ.
Good shoes and comfortable long trousers are recommended due to the rough terrain, thorns and the need to climb up a little to be able to log a find. The 3-star difficulty rating is also due to the fact that your GPS will probably not work properly once you are in the valley bed, although you should not have any trouble finding it once you are at the correct location. The cache is 1-2 storeys high from the valley bed.
Obviously due to the need to climb and the fact you are in a valley bed I would not recommend trying this after/during heavy rainfall or at night, or even alone.
Please upload photos of the log book.