I want to thank those who discussed the oversteer/understeer aspects.
It now makes more sense to me that the F150s with tow packages come with a heavier, solid front anti-roll bar vice the standard same diameter hollow bar and the effects that has. And that there is no factory rear bar.
It has also helped me make up my mind on NOT getting the Hellwig rear bar. While that would improve daily empty driving, I now think that it would not help towing at best and possibly be an actual oversteer concern while towing. Throw in the recent increased cost of the bar & its now a no go for me.