I understand. I have one who is past the populage princess age, but still loves the whole thing.
Would she enjoy BBB? At 11 she is within the age limit and perhaps you can book a meal at the castle. Aurora visits there. My daughter didn't get to do BBB until she was 9, so that is older than most I guess, but matters not to her. She wants to do it until she ages out.
Now granted she doesn't wear the Disney Princess dress for it. At 9 I had CRT booked for dinner after so I got her a long formal gown in her favorite color. I found it on ebay for $20. She wore some sandals from home and Disney princess accessories.
We did CRT, but then we stopped at Town Square Theatre on the way out. This was in 2012, so Belle was there. But Aurora was there in 2013.
Last summer no CRT, so we did a different look, more comfortable for running around the park. She got lots of compliments. Skirt is from ebay. Other stuff except the vest is from local stores.
This May she'll be 11. I told her we could do BBB with CRT one more time. Then we'll switch to Pirate's League since her brother is old enough and wants to do it. This year's dress is more similar to the first one. It's just lilac instead of pink. Also purchased on ebay.