Welcome to the site. The 1809 has a GVWR of 4556 lbs, so I agree that you're no where near the capacity of your TV. I don't know that you'll need a WDH but you might want one.
To tow correctly your tongue weight (TW) should be at least 10% of your RV's weight. I would shoot for 12% but anywhere between 10% & 15% should work great. I owned an RV once that I HAD to tow with the fresh water tank full to get the TW heavy enough to tow correctly.
Equal-i-zer now makes a 400 lb model that might be perfect for you. It would give you some weight distribution as well as some sway control. Even if you don't specifically need it, it sure makes your rig tow safer.
Salem 29RKSS Pushing a 2500 Mega-Cab CTD!
Gotta go campin!