I had some success with this approach. I had a 16', 4" steel pipe with a 300 lb cement footing (about 2'x2'x4") on one end and a rack of solar panels on the other end. I was able to reach *just* above the center of gravity with my loader.
I used two choker chains, each with the choke around the pole, and the chain end on my bucket hooks. The choker gripped the pipe just fine, and the two of them hooked to each end of the bucket kept the pipe centered and prevented side to side movement.
It worked, but it was VERY precarious. I nearly soiled my armor on several occations. The biggest problem was keeping the choke point above the center of gravity. If it gets below, then the pipe will fall and in my case it would easily have tipped over the tractor since the whole assembly weighed 600-700lbs.
What ever you do, proceed VERY carefully.
Chokers, by the way, are just chains with essentially a ring on one end. You wrap it around the log and thread the chain through the loop just like a choke collar. The harder you pull the tighter it grips. Real logging chokers have more of a C shape to the ring (it's not a complete circle) so you can hook it over the chain rather than have to thread it all the way through.