The pictures of the round traps in the post are the best. When there are tides, add some lead to the inside bottom. I also like to have a 25 gal plant pot for the rope to curl into when pulling a pot up. Sportco has good prices, but Cushman Marine by Potlatch has an even better model. I use herring or salmon carcasses for bait.
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Happiness would be retiring from my job, to run a bait and tackle shop on a bay somewhere, greeting eager fishermen at 4am as they arrive, and of the stories that will told at the end of the day.