Yes and yes.

Use a bait diver and whole sandshrimp with a spin-n-glow. Hot-n-Tots for normal water and Mag-tots for the deeper slots. Work that bait diver through the slot nice and slow and side to side. Work it some more...and more...and more. If you see some fish rolling, work it some more. If that doesn't work, and you can row back up to the head of the hole, sit on anchor with your baits out. Kings mill around in the slots and will eventually come close to your baits one way or the other.

Persistence will get these fish to bite.

Usually, when I've targeted kings on the Sky, I'll pick 2-3 known good deep slots and work the snot out of them. You should be able pick up some fish...or at least get a take down or two.

This fish was from last year at this time. Hit the shrimp while on anchor. Some of you can probably figure out where that is. That's almost always good for at least one fish.