I posted this on the Chehalis river thread, but thought I would start one about bait for squawfish.
I have found that squawfish will fight to get at pieces of salmon sperm sac. It is hard to keep on the hook, but they bite it so fast that it doesn't seem to matter. If there is a better bait, I would be surprised.

In fact I have some vacuum sealed in my freezer now. My wife thinks it is strange but I was going to participate in the Columbia bounty they have for pikeminnows, but never have.