magicheater,
If your going to attach a light logging crane grapple on a quick attach plate why don't you do it where it will handle more than a 1" round sapling (better stronger teeth) and put a rotovator on it so you can turn the saplings and small trees side ways to load or stack them, and that would also give you the ability to load an unload logs off a truck, trailer, or pile.
There is already a design out there that can handle very large trees, it called a Feller Buncher, just alter that design and down size it like you have with the logging grapple.