Lynnmor gave good answer. Just for your reference I towed a 28 foot TT for years with a Dodge Ram 2001 1500 with 16 inch wheels and the WDH hitch drop was about 2 inches. I towed same trailer with a ram 2002 2500 4x4 with 16 inch wheels and drop was about 4 inches. Different trailers will have different tongue heights for level towing. U-Haul trailers are around 18 inches high level and I use a 2 inch hitch drop on my Ram 1500 and the trailer is level. The hitch ball of an Equalizer WDH system is adjustable in height and angle to a large degree.
That is my non expert experience and enjoyed safe trouble free towing in the Rockies and west coast mountains for many years.