Used to catch them in the Columbia river, both white and green sturgeon. Anchor up facing into the current, and fish bait on the bottom off the back of the boat, fresh smelt, if you could get them, were the best bait. On an average day, you'd get 30-40 of them, but these were not the 8 foot monsters, most of them were 24-36" long. They had a slot limit, you could keep 2 a day that were 42-48" in length. I kept one once, but not at all impressed with the taste, even smoked it and it just wasn't that good.
Those Snake river fish are caught over and over, they aren't too bright. It is all catch and release and they are a tough fish and can handle the repeated catching. Supposedly the guides have named individual fish that they have caught multiple times. Never did go to the Snake and try it, but maybe someday I'll make a trip out there to fish for them. I know people that have caught them, and those fish will flat out wear you out, one of those deals where once you catch one, you lose the desire to catch another.