"These are not clear-headed animals."
That's a bit of an understatement.
And yes, they really stick close to their flock. I have 3 keets, and they escaped the 2nd day we had them in the chicken pen with the others, when they were 3 weeks. I have one with a bum leg, so of course, I was concerned for it. I caught one (not Gimpy) about 2 hours later. He was so scared to be alone, he kept hollering for his buddies. I put him in a giant dog carrier in the center of the pen. About 4 hours later I caught the other healthy one when he came to visit his buddy.
6 hours of screaming guinea. Oy.
We figured when he wasn't back by nightfall, Gimpy was toast. Summed it up to "Survival of the Fittest". Besides, our neighbor has 5 free-range cats. Surely they'd pick him off.
The next afternoon I found him on my back porch. He traveled the farthest, about 100 feet through tall grass and a blackberry patch. They are now all together.
And boy can they fly! Even with clipped wings they pick up some height.
I don't think you'll have too much trouble. What they lack in sense, they make up with flight and (from what I understand) size.