Doc_Bob said:10 yards? That is nothing. Wait til you buy it and spread it, then you will see that 100 yards is starting to get into real dirt. 10 yards does not go very far.
Bob
Ain't that the truth!
Z,
If you just find a spot that you don't mind being low and start digging there, you can save that few hundred bucks. Scrape off the top soil and pile it separately. Then use the bottom soil for the filling. No matter what you do, the areas around the fence are going to be paths with not much growing due to the horses running there. I wouldn't sweat it too much. It will need extra lime and fertilizer, and the horses will be adding some organic matter.
If you prep, seed and use a cultipacker in the early spring, it will firm the soil and you will be able to put the horses on in the late summer or early fall.
jb