I know you don't want me using Photoshop to create a poster. This is because you want me to buy Illustrator or InDesign. I have news for you though, I have those applications, I just don't like them.
So I did my poster in Photoshop, God help me.
And then I created a PDF from it.
And then I went to add tags to the PDF file, and Acrobat immediately HID 6 of my layers, resulting in a PDF that now has tags, but no visible text.
You won't let me tag from Photoshop b/c it's not a layout application, and then Acrobat is insane?
My friend Matt has an icon for this sort of behavior. It involves his middle finger....