JamesDowning
Explorer
That's basically what I have. It's a 1/2" bolt that threads into the hitch pin hole. It keeps it from wiggling around pretty well and I haven't had any issues with it backing out.
You can essentially do the same thing with this kit from Curt:
I've also seen guys use these with good results:

You can essentially do the same thing with this kit from Curt:
I've also seen guys use these with good results:
