With a winch and some snatch block it would be easy to winch them off of the back. Winch at the front, snatch block at the back and attach cable at the front of log.
Wooden.All off at once did not cross my mind so thanks for that Chris. I am pretty much aware of the weight thing but it was well to mention it anyway . 7000 lbs can be gotten to right quick with just a few fat stems.
Do you have a steel or wooden floor on yours?
I use 6x6's which are higher than my fenders, and extend them a few inches out beyond my fenders...What about when the log rolls off? Then it's going to crush the fender.