Stormtroopers at Disneyland are a bit elusive and if you do find them, getting a posed picture is even harder. But it can be done!
Timing is everything. The Stormtroopers are part of the Jedi Training Academy, and unlike the other characters there, they sort of wander off towards the end of the show. If you don’t have a child in the Academy at the time, you want to be waiting directly behind the stage or in the area of Star Traders.
They will head off towards Star Tours and hang out there for awhile. However, being Stormtroopers, they aren’t exactly friendly and are more concerned with security than with taking pictures. Don’t take offense if they turn down your request for a photo! Try a little Jedi mind trick – with a slight wave of the hand and a comment like, “I really want to take a picture with you”, you might get lucky. Or you might have to position yourself or your child right in front of them and they will comply. Just be quick with the camera and know that you will probably only have one chance.
I was able to get a picture of a Stormtrooper with Bip. Even though our Stormtooper agreed to the picture, he kept sort of moving off. I had to get out my Mom Voice, complete with Stern Face, and tell him to stop moving around! He obeyed my order and held still long enough for a good picture.