My buddy John also saw those boats casting in same area the day before i fished with him. He told me was not marking any fish when he drifted with them. He also said saw nobody netting fish and he got skunked casting too. But i pay attention to a pack of casters. Especially when there are charters casting. You know they are usually on fish. It can be hard to see the boats netting fish too. But i always tell our driver.... don't drive through them...stay on the outside of pack and you will usually find some active fish.