Depending on price difference, the 19BH is 1' wider, with 300lbs more payload. The 18BH with 835lbs of payload will go very quickly. Though you will have the truck bed for camp chairs, cooler(s), grill, etc....
Is there 1 or 2 propane tanks? The dry hitch weight is without a battery or propane, so that will push the tw (tongue weight) close to 500lbs even before you load anything else in the trailer. Due to this I would keep the wd hitch, even if you scale at 480lbs tw (a rough example) it will help maintain steering control as mentioned compared to no wd hitch.
Congrats on the new truck & trailer!!!
