PP lines are generally long, but late Feb, early Mar should be easier.
The interaction by both the characters is AWESOME. Please note that this may be the reason (apart from popularity) for the long lines, but both will spend as much time as needed with your DD and REALLY get into their character. I think you will love it as a parent.
TB will be near the entrance and the 3 times we have seen her, the wait time was 15 min posted, with 10 min real. PP was about 20 mins twice and 40 mins the other (20 mins was in Jan, so am expecting the same in your timeframe).
HAVE FUN.