Some great plans! A couple of thoughts:
- I would recommend at least 1.5 hours in the plans for transportation - especially since you have to transfer to the monorail to get to the Wave. A large group is sooo much slower. It blew my mind. Then throw in little kids, stuff people forget and on and on. At worst you will get there a little early. Spares the stress of racing to make it for your ADR.
- as many times as you can watch HEA, go for it. That and Flight of Passage were the highlight for my large group.
- for Sat, Dec 16...you know if you go to Kona for breakfast, you are definitely missing Epcot Rope Drop. If it's worth it, great. If not...then you may want to reconsider. Another idea would be to go to Epcot for RD, then backtrack to Kona for a late breakfast/brunch. Then everyone can monorail back to Epcot then bus back to your resort. Also, I'm sure you already know this - but to go to the Poly, you'd go to the Transportation and Ticket Centre and use the walkway to the Poly. Personally, I didn't find it immediately obvious where the walkway was but thankfully was able to follow some other folks headed there too.
- for your Tusker House breakfast, I would aim to get there for 8am. That way, you have the slim possibility of being done in time to ride FoP at Rope Drop (to be honest, this is hard because you will still be behind the rope drop pack). It really is worth multiple re-rides, even with limited time. If you choose not to try for FoP, i would still go early and then do KS standby. You will have an extra half hour in your day to fit more attractions in.
- an 8:15pm Tutto Italia means you're pretty much guaranteed to miss Illuminations so something to keep in mind in case some in your group want to watch it.
- Monday, Dec 18: sounds like the kids in your group are early risers. I will caution you that it might be nice to have a sleep in morning. Not that will likely sleep in - but it is really nice (even for my go, go, go self) to have a morning with nothing to rush to, to have time for morning snuggles, and just take more time getting ready. But of course, with RD, you can do stuff like ride RnRc. I found RnRC to be a very hot FP and extremely difficult to get same day. I did the constant refresh trick (for one person at a time) one morning, and could only get it for 8/9pm that night. I was surprised since that trick has worked for me on multiple popular rides and I don't remember RnRC being so difficult. ToT was much easier.
- I found Homecomin' to be very difficult with larger groups. Even at 180 days, I could not get ADRs for a group of 8 during peak dinner hours. I also had *********** alerts set up and it was very rare for an ADR to pop up. That said, I cancelled mine a couple of days before because my group wasn't crazy about the idea of fried chicken.
- DEFINITELY use mobile ordering at BoG. I've eaten there over 3 trips and still ALWAYS forget to mobile order. This past trip I promised myself I would mobile order...but we still didn't. *sigh*. If people are not sure, just tell them to order whatever because you can change it when you get there. Saves a huge line.
- One caution is that you have a lot of hopping around. I would consider transportation time, especially with so many little kids in tow.
HAVE FUN!!! I love that your group has been willing to give you so much input. I tried to get more input from mine but only got some. The rest I had to find out by listening as we walked around the parks. I dropped and added a couple of ADRs during the trip based on that. Also rearranged a bunch of rides. I knew a 3 yr old was slow, but didn't expect the whole group to move quite that slowly!