I did try that a little bit and it did seem to move material, but I was worried about the loading on the backhoe cylinders and boom.Pics would help, but if you get a friend or significant other to drive tractor on low range, you on the BH it would go pretty quickly. Also, you can try setting the bh bucket in the swale and let the tractor pull it - this is hard on the BH and frame though and could work for loose material..
Pics later today.