will be towing our 28 ft TT weighting about 4900lbs with a tongue weight of about 380lbs.
Your tongue weight is WAY too low. Dangerously low, in fact. You want about 13 percent of the total trailer's weight on the tongue. Plus the weight of the hitch. If your hitch weighs around 75 pounds and you are at 13 percent on the tongue your total weight will be around 810 pounds. Anything less than 10 percent on the tongue is inviting sway issues. Hopefully you are using a weight distribution hitch and also a sway feature. Then, add air to the bags to get a level (pre tongue weight) height.
