I've been logging with a tractor for many years, and I've tried grapples and quite a few other ways to load logs, clean slash and many other jobs with a tractor, out in the woods. By far, the best way I've ever found is to use pallet forks with a matching single grapple, like I have now!
It does everything a big grapple does and much more,
Even moving pallets or boxes of wood,
and if you want, you can saw right between the forks,
I can push the forks together and drive them into the ground under a boulder and pry/pull and lift the boulder right out of the ground,
Because they do just about everything so well, I "rarely" take them off!
SR