This sounds a lot like a rescue Little Orphan Animals did this summer. An old man was feeding approx. 2 dozen cats, mostly orange. We pulled, vetted and fostered them; there was a fairly high mortality among the kittens and possible genetic damage, but a lot of the kittens were adopted and are doing really well. If the colony in the trailer had orange and white cats, then it's probably close to 50/50 male/female.

I'm glad these kittens are socializing well!