We added a rear trac bar and I did the CHF on both ends. Tried a steering stabilizer but DW and I did not like it. So took it off and had a bit of positive caster added it helped the wander along with the other changes. Ford hotline said adding caster was no problem. 15000 miles after all these changes and tires show no unusual wear and it drives like a different machine. I would suggest doing the CHF first, it costs virtually nothing except the extender brackets you will likely need for the front. They can be made for little or purchased for $50.
I would also add the rear trac bar next. Add positive caster if needed. In my experience front end alignment is likely not the problem, but should be checked as a precaution.
