A customer of mine bought a house with a very steep gravel driveway. There's about 70 feet of it that's a little too steep for all-weather use... much rain and you need 4wd to get up, and the gravel turns into potholes quickly. They've asked that we pave the steep section with concrete. I've never poured on anything this steep. Seems like a stiff mix would be less likely to flood out of the forms, although harder to move down the hill. The finish is to be very rough... a "rake" finish as opposed to a broom. How would you handle this?