Sure can. The easiest way to do this is to take pictures with the camera app built into the phone or tablet and then choose the ones you want in the report.
Another is way is to create a special section in the report called "Additional Photos." You can add as many photos as you like to that section then hide specific ones or the entire section before you publish your report.
If you decide to go back and look at your report later, all the photos will still be there.