I use to do real well floating green crabs under a bobber in both nauset inlet and the back river in weymouth. I've caught many mid 20 to 30lb fish this way back in my bait days
One of the biggest bass I have ever seen was caught by a guy who spiked a rod in the front of his truck with a bobber the size of an apple, and an eel.
He just sat inside drinking and listening to C & W till the rod went off.