Onion,
I did a little white cedar logging at my place on a steep slope. Not nearly as long as yours but still steep enough to be challanging with the atv and some parts way too steep for anything but me. For stuff as small as your talking I would just put a chain around them and drag them myself to the atv. Downhill it was pretty easy. Now I can't see doing this for each log down your whole hill but if you can get some access points that are atv accessible it might work. Also cut around there first, you might get all you need sooner than you think.
It was pretty hard to cut selectively as well since cedar here grow very densely so I cut small patches with trails to some of the trees I specifically wanted. Its good practice for your directional felling too since hitting that 4' gap 50' out would save alot of effort dealing with a hung tree. I have a good cache of fence posts now too!
Once on flat ground we just manhandled most logs into a trailer, some bigger ones we used a couple pullies to drag them up. Not easy but cheap! We looked into getting a guy to skid them but it wasn't going to be worth it for a a few thousand board feet. I do like the staple skidding idea too, would be neat to see.
Ian