Multiple 50/50 shots.  Don't forget, each Climb Check only moves you 1/4th of your speed (8'), and (using the eastern approach as a guideline) that's a 50' climb.<br/><br/>Meanwhile, if you use the hook, it's a DC 10 to fast-climb half your speed, and as long as no one is<em>shooting</em>at us we can probably Take 10 on it.  Using double-moves, that's someone up in two turns (assuming someone else throws the hook for 'em).<br/><br/>If we wanted to be jerks about it, we could wait 'til the switchback team starts their charge to mask the sound of the hook :P