Taking into account what Bruce posted, we have used our skidding tongs to both lift the leading edges of logs for skidding and to lift them into the bed of our truck.
However, as the folks on the forestry forum are quick to point out, the safer/est way to liftclogs is straps (or chains) used in choker fashion.
But they are talking about using big logs overhead, not just lifting the front to skid...