My brother had a Chestnut Oak come down on his property last year. He had a local tree service come by and buck it to length, load it on their trailer, and haul it to the mill for what I though was a VERY nominal fee. You might look into that if you don't find another option you like.
And I'll add to the chorus shouting "Don't put that in a pickup truck bed." There's no such thing as free wood. You can pay a little up front to get this done right, or potentially pay a lot on the back end when something goes wrong. A standard pickup bed isn't engineered to handle this much mass in the event of an accident or sudden change of direction.