I don't know that I'd really add more. It all depends on who and what you're protecting against. The only thing that's secure is something that doesn't exist.
National level hackers have access to resources you might not be able to think of. And if they really want in, rubber hose cryptography is super effective. But most "hackers" on the Internet? And encrypted zip is often enough to deter them. Not impossible, but you might not be worth the time and effort.
In summary, there is better. Much better than an encrypted zip file. But only you can judge if you're a juicy enough target to pursue more esoteric protection.