I'd do 7D, and meet the princesses during the 1st parade.
My priority for characters is determined like this...
First, we figure out which characters go along with our costume theme, and then any extras we wish to meet. Once we have that list, we meet any of regular daytime characters on the list entering right at 4:00. We will grab food around 5:15, so that we can line up for one of the headliners (J&S, 7D, CJS) no later than 6:00. Since we usually wear hot costumes, we try to do as many indoor greets and attractions (like Laugh Floor) until the sun goes down. Most of the Fantasyland characters have very little wait during the first parade and later in the night. We met Donald and Goofy and WtP with 10 and 15 minute waits. This photo was taken last year at 11:50pm. We had been up since 6am. I think my kids are part robot.
View attachment 117830
That was our 2nd party of the trip, which was really only supposed to be for riding rides, but we found such low waits that we met a few characters (also met the Old Hag with about a 5 minute wait)
Normally, I know exactly who we want to see right away, but this year has me a bit stumped. While our costumes are Disney, they are so unique that I'm not sure who our best options are. I know we will ride CoP as soon as we get there because it is typically closed during
MNSSHP. We will also need to take daytime and nighttime photos with the CoP gears, and other Tomorrowland areas. Pics with Walt's statue must happen. We got a really great one at the end of the night last year, so I'm looking forward to that. My thinking right now is that we will meet characters that have rides in the park, with the exception of 7D. My wigged head won't be able to handle the heat of that line.
If anyone has any character suggestions for me, I'd love to hear them.