Okay, I'm pretty much done I think. Ended up using a LOT more dirt than I thought I would and am not going to save quite as much money as I thought doing it myself, but it was a good experience and I know it is packed in good and solid.
Ended up using 8 - 8 yard dump trucks of dirt and I used around 10 yards of my own dirt from another site that I moved over 1 bucket at a time to get it all level at the end. We still have to pack in the last layer with the jumping jack tomorrow afternoon but that's about all.
I'm 2" low still, but I think I will just leave it. It may end up 3" low by the time we pack this last layer some more but even that isn't bad for a 40 foot length. I'll just let the concrete guys deal with that, I'm sure they don't get perfectly level spots very often anyway. It would be a lot of work to add one more layer for 2 or 3 more inches.
Here's a picture of me packing in the last layer of dirt:
All the pictures are in this directory, the titles are pretty much self explanatory.
http://padens.com/files/tractor/barn/
We ended up doing 4 layers and packed them down with the tractor and then the jumping jack between each layer. We ended up having to wet down the dirt before packing down each layer also. The best method seemed to be leveling out the dirt with the tractor, spraying it down really good with the hose, getting a big scoop of dirt in the bucket and driving back and forth over the site, then running over it a couple times with the jumping jack. Then repeating.
Thanks again for all the input!
Ended up using 8 - 8 yard dump trucks of dirt and I used around 10 yards of my own dirt from another site that I moved over 1 bucket at a time to get it all level at the end. We still have to pack in the last layer with the jumping jack tomorrow afternoon but that's about all.
I'm 2" low still, but I think I will just leave it. It may end up 3" low by the time we pack this last layer some more but even that isn't bad for a 40 foot length. I'll just let the concrete guys deal with that, I'm sure they don't get perfectly level spots very often anyway. It would be a lot of work to add one more layer for 2 or 3 more inches.
Here's a picture of me packing in the last layer of dirt:

All the pictures are in this directory, the titles are pretty much self explanatory.
http://padens.com/files/tractor/barn/
We ended up doing 4 layers and packed them down with the tractor and then the jumping jack between each layer. We ended up having to wet down the dirt before packing down each layer also. The best method seemed to be leveling out the dirt with the tractor, spraying it down really good with the hose, getting a big scoop of dirt in the bucket and driving back and forth over the site, then running over it a couple times with the jumping jack. Then repeating.
Thanks again for all the input!