I'm not seeing a tow strap in here and that is the FIRST thing I put in my truck and van. Maybe they think the average idiot citizen isn't capable.
I'm new to the Michigan UP, but locals here have recommended a grate or kitty litter for traction.
The rest of the list looks like good stuff.
Most people don't even know where to hook up to. I know this guy who has a mustang got stuck, some other guy came to help, guess where did they hooked up the strap? They hooked up to the tie rod, you can see where this is going.