Personally I would not try it. My rule is that if what your towing weighs more than the vehicle, no no! I have a 5th wheel travel trailer at 8-9k and tow it with my '91 F150.....after many mods! 5th wheel trailers are much more stable than bumper tow. With out the mods that RV would have made road kill out of me at anything over 30mph. Even that was iffy. With mods I tow at 50mph and lots of experience. The Raptor with it's 5 link is not designed for towing at all. Yes, you can get away with small utility loads but I would not exceed 2k or you end up like this poor fellow.
Rolled new truck
Pick up a used F350 and tow with that. The family can ferry the Raptor.