In the truck, it's a B&W, on the trailer I think it's a Bulldog, but not sure. I am looking to mount the flag to the trailer.I didnt see any pre made adapters for a gooseneck either. Plenty of them around for a 2" receiver. What type of gooseneck hitch do you have? Would be fairly easy to drill a hole through a flag pole that fits in a B&W hitch that the locking pin would hold in place.
No ladder on this unit. If I had opted for the genset mounted on the roof at the rear, where the hay rack would be on a horse trailer, it would have a ladder. Plus being a toy hauler the ladder would be on the side, and at 102 wide I can't hardly see down the sides of the trailer in the mirrors so as it is. That would be a great setup, though.Don't know if this would interest you but I finally broke down and bought this one. It is a very nice setup. My aluminum pole snapped in half when one of those 60-80mph winds went through here. This setup is a ladder mount.
https://www.rvupgradestore.com/Flag-Pole-Buddy-2-Pole-Kit-p/106201-kit.htm
I have looked at the under-tire mounts, and have not ruled that out.