We are planning a Disney/Universal trip in December. We have been to Disney several times but we have never done Universal before. I have 3 kids who are big HP fans and my youngest will be having her 11th birthday on the 26th. The plan is to do Disney first either 3 of 4 days, we can't decide. And then to do Universal for two days, the 26th and 27th. Does anyone know what we should expect for crowd levels? Any advice for a birthday at Universal? Any other tips or advice for tackling our days there? Part of me is wondering if we should do universal first and then disney, but my daughter really wants to do universal on her birthday.