I think I'm going to stick with the fifth wheel hitch I've already ordered. Its what I'm used to and I can still go with the Gen Y set-up with a king pin.
Yes, the fifth wheel hitch takes up far more room but I have the pin that I can hook up to a chain and lift it out with my front end loader on my tractor.
I know people can "push" a particular product on YouTube but this company sells both the gooseneck hitch and king pin fifth wheel hitches. The fact more videos from people using the gooseneck; I don't see them pushing anything.
Now I will admit one thing they seemed to be touting that raised my eyebrows: That some people have seen a 2-3 mpg improvement using the gooseneck versus king pin. That doesn't make any sense to me.