Why Gooseneck?

Gooseneck is a better choice when you get off level a lot. I've had my stock trailer leaning at crazy looking angles. You have better articulation with the ball, and the frame is up away from the bed rails to the point that rail clearance isn't even something you think about with most goosenecks.

Even with a permanent gooseneck installed in the truck, most of the bed is still usable so for people who typically use their truck bed a lot, a gooseneck is more convenient.

Remember, a gooseneck hitch is a ball located on the bed of the truck. It doesn't sit a foot to 18 inches or higher off the bed of the truck attached with rails and such. Many gooseneck hitches are designed so they can be flipped over or removed easily, thus giving the truck bed 100% usability when not towing.

Folks towing horse trailers use the bed of their trucks for multiple reasons. Thinking of one immediately ... moving hay and straw bails to the barns and fields. They need the full truck bed as their use is for more than just towing a trailer for recreation.

Horse trailer goose necks have been around, seemingly ... forever. Part of it (today) may be ... well ... that's just the way it is. The basic original design works so well... why change it?

That's the advantage of a gooseneck. (I know, I've lived in farming country, pretty much all my life, except for a jaunt with Uncle Sam living in tents for a while).

My guess would be that the people who haul horse trailers want to use their beds more when they are empty, than people who haul 5th wheel RV trailers. The gooseneck has a much smaller footprint in the bed of the truck. Also due to the design, a gooseneck trailer will be heavier than a comparable RV trailer.

Gooseneck trailers are generally stronger than 5th wheel RV trailers, but that's due to how the trailers are built, not because the gooseneck is an inherently stronger design. IMO RV trailer builders tend to be more cost conscious than horse trailer builders because they are adding many more amenities than most horse trailer builders.

Anyway, that's what I think. :)

beats me but it looks to me like the goose neck is a lot simpler/lighter/cheaper/etc.
bumpy