Depends on the situation. Usually, I stay some 20 meters to the rear, allowing the drivers to turn right, and, in case they didn't see or notice me, I'm all the way to the right, not in their path. Once the traffic starts moving, I have enough time to merge, never had any problems. Right hook is not an issue at such low speeds (just speeding up). Especially if you look out for it. Hands on the brakes, moving away from the side of the road as I speed up, to have some maneuvering room.
The other option, if the right turning lane is really, really busy, is to stay in the right side of the forward/left moving lane. Usually letting one car in front of me. But staying to the side of the lane, just in case some driver doesn't stop and on straight (happens sometimes).