Thanks for the responses. I did have an after market 2 inch receiver hitch put on by my local Ford dealer versus U Haul whom I have always used. I was definitely going to get the sway bar.
FYI, The trailer I was interested in made by Micro light, it is the Cargo Lite Extreme. http://microlitetrailer.com/brochures/microlite_cargolite_extreme_brochure.pdf