Given that the model 378TS is nearly the largest model of the Georgetown line, and that they all have the same Ford Triton V-10 engine, you're really getting up there as to total weight capacities and towing limits. Remember that it's not just the motor power for towing that needs to be taken into consideration, but the stopping ability of what you're towing. The more weight you put behind you for all your toys, the less it leaves for the motorhome itself.
There comes a time when maybe a deisel pusher with more heavy duty considerations is the vehicle of choice.
Be careful out there.
Ken and Terry
2010 Georgetown 330TS being pushed by our
2017 GMC Terrain toad (4 wheels down)