My $0.02 - it's not always bad to have a guinea lay eggs in the pasture. They usually will lay their nest in thick brush or woods - it took me two weeks to find where my guinea was building her nest. Long story short she decided after three weeks she'd had enough and abandoned the nest. I took all the eggs and put them in an incubator and hoped for the best. One guinea keet hatched out yesterday and I'm hoping more will today!
Now the flip side is that I have two others out there and I'm fairly certain one is a goner. Found tufts of feathers throughout the field and three eggs cracked open at the other side. Still can't find the nests or the other guinea, though, so I'm trying to stay optimistic. I have boarded up the remaining guineas, male and female, to start retraining them, so that's definitely the way to go.