Usually I like to gut and gill them right away,unless the bite is really on I'll bonk and gill leave it in the water to bleed. not bonking they can flip them selfs back into the water and your out a fish you just killed. Leaving them in the water depends what system I'm on, or of I have a cooler. Chehalis, vedder, squamish, into the water, as I'm not packiong around a cooler. On the Fraser right into the cooler, as I'm most likely in the boat and have the cooler.