I like a size 8 Kahle for the grass shrimp and 6 for crickets.
If you are fishing from a boat and can get right on top of the structure, I also love drop shot rigs. Just down size from what you'd use for bass. I really like a size 8 VMC spinner drop shot hook. Usually a 1/8-1/4 Oz drop shot weight. Place the hook 12"-18" above the weight. This is where grass shrimp are hammers! You'll be amazed at how large of an LMB will hit this setup as well.