Last Nasty can most easily be scouted or portaged on river right (although the eddy at the top of the drop on river left looks inviting scouting from this side requires some spiderman moves). The rapid itself requires a right, left, right set of moves with opportunities for skilled boaters to eddy out in between the sequence of drops and holes that need to be negotiated. It's worth a scout to pick your line and check for wood around blind corners.