December 14 trip questions

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According to Touring Plans the crowd levels will only be a 3-4 from Dec 14-17. We will have 2 EE days - staying at Cabana Bay. We opted for the 6 parks for 14 days pass. I was thinking about arriving early 1 day for Diagon Alley and 1 day for Hogsmeade. The other two days we would go straight to some of the other popular attractions first thing. I think this will be plenty of time to really explore these parks and I don't think I will need an Express Pass? We did visit 5 years ago and so we will skip a few of the rides that we aren't as interested in seeing again. We will be in Orlando for 3 weeks but really wanted to visit US/IOA before the Christmas crowds. Our plan is:

Dec 14-17 US/IOA (Cabana Bay Dec 13-15, Timeshare resort Dec 15-22)
Dec 18 Aquatica (weather permitting)
Dec 19 Busche Gardens
Dec 20 Sea World
Dec 21 Nothing
Dec 22-28 Disney Parks (staying on site for free dining)
Dec 29-Jan 1 (Chilling at 2nd timeshare resort or maybe 10 Day Disney pass)

We don't plan on going back to Florida for several years after this trip. Any thoughts, suggestions, or advice would be appreciated.