Every now and then I see a 5th wheeler with a tripod under the pin, apparently for added support. Does this really do anything? The trailer sits on the wheels, the landing gear and the rear levelers?
I've only seen one in use in many years of camping. That fellow said it did not do much, but he was using it because he had bought it but did not use it about as much as he did use it. When we had a 5th wheel, I never considered one. You will just have to decide for yourself it the minor "aid" is worth the bucks to you.