Hooray! Here's hoping this is the start of lots of lovely long naps. I think 6 sounds like a good time to shoot for - I would try to aim for a bedtime that you can do relatively consistently, though. I think that trying to get a consistent bedtime will help sort her out, so if you're not going to be able to put her down at 6 every night for the next week you might want to adjust it to a time that you can always do, iyswim.