Did anyone of You ahve experience with Tanner Trail at Grand Canyon ?

I have some maps which shows the foot trail next to the 4WD trail in that area (Tanner Canyon).
I have an idea of going (4-wheeling) down to river, I found the post with Peach Springs road too.
I want to check if it is possible before I will plan the trip, if any permissions required, type of the road etc.
If the Tanner will not be possible than I will stay on the North Rim and 4-wheel in that area, not drive to South Rim.