5th wheel with Class III hitch on back - Excel - who else?

You can beef up the hitch if necessary. My 3000/300 is what the factory provides. I pulled a 4,000 two axle boat with my first 5er on a hitch shop installed hitch, and I said to heck with warranty.

Just watch the rating on your pin box, and the 5er hitch, as it all has to be rated for the combined.