Finally got to run totally barefoot outside yesterday. I went to the soccer complex, where I thought there would be very few gravels on the track around the fields. There were too many gravels for my tender feet. I ran mostly in the grass beside the paved trail. That was fine, it felt good. I ran a total of 2 miles, then the skin on the bottom of my feet just got too sore to continue.
It seems like when I wear my VFFs or run barefoot on the indoor track at the Y, I don't run with the "barefoot form" that I want use, so I will try more barefoot outdoors whenever I can.