The cache is a small 500 ml camouflaged cliptop box. For some reason, satellite signals played havoc with the GPS, with EPE occasionally reading as high as 50 metres. Because of this, over 50 readings were recorded over several days. The hiding area should be fairly obvious, even if your GPS leads you somewhere else.
Warning: Team Boodi has just pointed out that used needles have been seen in the area. Please be VERY CAREFUL. For this reason I have added an encrypted clue.