It depends if hitch receiver is rated for the tongue weight of your fully loaded TT as many can only handle 500lbs without a WD system. I don't have much sag as well without our WD/SC hitch engaged but I wouldn't feel safe hitting the interstates or highways sans one, especially with the high winds we encounter here in the four corner states. With the powered tongue jack doing all the heavy work, we just drop spring bars in place and we're good to go. Solid as a rock even when traveling at interstate speeds and passing commercial diesel trucks.