I have a bumper hitch on my ranger and I move aluminum boats all the time. You will be just fine with such a small weight.
I think the major downside is the non-adjustable towing height. Just keep it in mind when you are stopping. It is not much weight to worry about anyway.
Go to a salvage yard and get a frame mounted hitch for about $20.... then you don't have to worry about bending up your bumper.
sounds like a light load to tow...if your estimates are correct... my thoughts are ,...will the trailer ride level ?...I would measure it, ... couplings are made to ride at level...
a Durango's bumper is pretty high...