We never wait in longs lines for the characters. I plan ahead the night before by calling the PALS line which will list each character and where they will be. I get there 20 minutes before with the princesses. Get to know the person who supervises the characters...that has helped me alot. I go to the place the character I want to see and aske the CM with the current character if this is the correct location. When they confirm it. They usually tell me to get in the line & they will be cutting off the line for the current character soon. They will look for you. You can then go to the end of that line. I always ask the people who are lining up behind us who they are waiting to see. If it is the current one, I let them in front of us. When the new character comes out the CM will takes us & those behind us to that character to start the new line. We can usually get 3-4 pictures/autographs during the 5-6 time frame...sometimes more if there are characters that we don't have yet.
I just took my notes from the last cruise out to give you some idea. Usually 5-6 before dinner & 7:30-8:30 are busy times in the atrium area for pictures.
Monday
5:15 Chip & Dale (in front of tree)
5:30 Capt Mickey & Minnie (deck 4)
5:45 Pluto (in front of tree)
7:30 Donald (starboard)
7:30 Capt Mickey & Minnie (deck 4)
8:00 Snow White (in front of tree)
9:30 Donald & Daisy
9:30 Snow White (preludes) means in front of the theater picture of Walt
9:45 Belle (in front of tree)
Another great time to see the princesses is any time during dinner.
Formal night Cinderella was appearing outside Preludes 7-7:20. Most people would either be at dinner or in the show at that time. We all dressed for formal night & got our pictures taken with the captain & such in the atrium before dinner at 6:15. At 6:45 I excused myself & DD. I took her to the bathroom to quickly change into her Cindy costume (which I carry around in a bag) and went to the spot. At 7 Cindy showed up took DD by the hand since she was first in line & went to take her picture. We were back at our table a minute later & the entre was being brought out.
With the schedule I listed above we got two pictures in costume with the princesses that night.
After dinner we went & got DD changed into Snow white & took a picture then went to see the show. After that we changed her into Belle & got a picture with her. It took me a couple cruises to get this system down to work for us...but seeing her smile when she looks at her picture of Cinderella with little Cinderella is so worth it.