How to view Adobe Photoshop PDFs on my iPad
Photoshop PDFs are a bit wonky even outside the iPad, and I have found it best to flatten and place them in InDesign and output a PDF from there. Even so, the iPad's PDF support is limited and searching the web for "iPad PDF viewing" yields a lot of reviews for PDF-reading applications.

In the end, however, it would be best here to have a Plan B (i.e., laptop and projector) if this so important. PDF support for the iPad still has a long way to go.