Everyone is different… We live in California so I understand the challenges of the time zone change when going to WDW. And then, some of us are not morning people. But you really can get more done in the first 90 minutes by RDing than you can probably do the remainder of the day. Rest when you get in to Florida, and go to bed on EDT and not PDT that first night. Last month, we RDed 2 days out of 7. We have a 19 and 21 year old to roll out of bed. Actually, we gave them the choice to RD with us or not. And if you can, alternative between late nights out and RDing. We couldn’t RD the next day if we stayed for fireworks the night before. And neither did we park hop. This was our second trip to WDW. It can take time to get around, especially by bus. WDW is not Disneyland. You cannot walk from one park to another. WDW is very spread out.
We had a 7 day pass, 2 days in each park except AK. We like AK more than HS but with the HS uncertainties, we went to HS for 2 days. The only day we wished we had a park hopper was our last day. We went to HS and wished we could go to AK for the afternoon and evening.
Even with a good TP, you need to manage expectations if you are not RDing on high CL days.
You really should read up about what there is to do in each park and project what your family may want to do. Then, you can better decide how many days in each park works for your family. My kids were 12 and 14 on our first trip to WDW. They loved Epcot. We actually spent a lot of time in the World Showcase. Last month, all of felt like we could have used another 1/2 day in Epcot. Of course, we were there during the Festival of the Holidays. There was so much more to do, see, and eat!
Then, also consider your family’s touring style at Disney. We, for the most part, have commando style touring. We like to open and close the park. Nobody could do that during our December trip! We are all older. We also love to ride our favorite rides, particularly headliners, over and over with RDing and Fast Passes. It was hard to do at WDW.
This can be a slippery path! There are many things you can pay extras for to make your experience better. You need to determine what type of experience you want.
I do consider the projected CLs, park hours, and EMHs when picking my park days. And then I work ADRs around them. But at 180 days out, they are just projections. Even at 60 days, the CLs may not be refined that much. They were refining CLs up to 2 weeks before my trip. Of course, RoTR opened a couple of weeks before our trip. That didn’t help. Nevertheless, CLs are projections. Our first HS day was projected to be CL 5. It was actually CL 1!. Our second HS day, CL was projected to be CL 10 and it was CL10!
Finally, going to KSC takes time. It is more than 2 hours in travel time round trip. It also takes time to get around on the bus on KSC property unless you are just doing the stuff in front. My family enjoys KSC. We went in 2012 and also last month. Both times, we were there only one day. But we felt one day wasn’t enough time last month because of the new Atlantis exhibit. Are you keeping a car the entire time you are in WDW? The resorts charge for parking. If you don’t keep a car the entire time and need to go rent a car, that takes time.