I only stack in the summer when Kings can be found at any depth. ... or when the Humpy's are in... (and looks like I'll miss that this year!).

As far as gear... Needle nose pliers, good wire cutters, extra rigger terminal gear (connectors/snaps, releases ) and weights. For fishing gear... anything green and as long as it glows.... That is the pretty much the Blackmouth/Summer Kings staple

Downriggin'

Hey I wanted to add.... I never have extended my booms fully - nor will I - too much torgue on my poor aluminum. I'll bring them out a foot/foot and a half with two rods out... This is especially helpful for us guys that like to work the bait and cutting quick corners around the bait ball.
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"If you are not scratchin bottom, you ain't fishing deep enough!" -DR

Puget Sound Anglers, Gig Harbor Chapter