Back in the early 50's, my Dad loaded huge oak trees onto a 4 wheel trailer using an 8N Ford tractor. Logs so large that only one log filled the width of the trailer. You just need a ramp up to the trailer (he used smaller logs notched to lay on the trailer) and a couple of chains looped under the log, then pull it up the ramp and onto the trailer. You just need some good stops on the trailer to keep it from rolling off the back side which could be very bad for the person and tractor pulling it up. <snip>