We went for 8 years with a 16' Featherlite Gooseneck, trailer 2-3 calves in front, the feed in the nose, tack box, wagon, panels, chute, fans and generator in the rear. We loaded the chute on its side, panels against the wall, tack box next to the chute, the wagon (wheel barrow) and the generator in front of slider. We put those there so we could make an easy exit for the calves in a hurry if needed.
The 4 more feet would have made it a little easier, but I will say I have loaned out the 16' to several people with a 24' when they just wanted to move some calves, or travel a few states over to pick up one or two calves, you do not even know it is there going down the freeway. I like it for our area because of the tight curves in the roads in our area, open flat roads the bigger trailer is fine.
I do know that there is more room in the rear of the gooseneck than the bumper pull, chute would not fit in the rear of the bumper pull.