fictional "dry" tongue weight doesn't take into account: battery, propane, water and cargo.
you will easily be over the 200lbs. limit.
only thing to do is have the dealer fill the propane, put a battery on and add water to the tank. then weigh it and see how much it is before you add cargo.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC