I was very surprised at all of the feedback. There is a lot of good ideas here. I will have to take some time to think things over.
Definitely realized that pulling the logs backwards is not good.
I have a two wheel hand dolly like the arch that I have been pulling logs with but It would need some modification to work with the tractor - a little too high up and the wheels are too close together so it tips. No hitch on it.
Adding a blade on the back sounds good so I don"t tip. These logs are not that heavy. Two guys can normally pick up a 16" log that is 10" at the butt. If they get bigger then it is too much.
I am trying to be careful. I will try to find someone who has done this with a tractor to show me before I try my hand by myself.
Thanks for all the input. This is really good.