My experience as a guide, I made sure when I started guiding that ALL my land was cleared, out of all the farms only one wasn't, met the FEO onsite, did a quick survey, got it cleared.
If it isn't just use the guides rifle.
And a word of warning, check out your 'guides' as well, make sure they are not just a fly by night type looking to line their pockets, check their licence for an open condition, get references, does the landowner know the guide is taking out paid clients, and finally, make sure they have their own commercial insurance, lots don't.