I lost the nut-on-a-stick for my tj a couple years back. I didn't want to search for another one so i just cut a square hole under the trackbar bracket (enlarging the existing hole) so i could fit a wrench in there. I used a grade-8 bolt and tightened that **** down good.
I prefer to use metric bolts with locking nut with a lock washer as well. It never comes loose.