So, my strategy won't work, since it is too easy to make the same mistake again. I've been looking for other solutions, and I've been trying nCryped Cloud, which allows you to selectively encrypt folders and files with the major cloud services. But it has some finder integration bugs (it does spurious folder redirects when, for instance, you try to look at your home folder), and its user interface is seriously retrograde (looks like a Java app). Their support says a patch is in the works, but I'm not convinced that this is the best option. Are there other strategies or applications that might solve this particular problem?
Any help will be apprecited.
I didn't find the right solution from the Internet.