OK, at this point I have to ask: are you making better plans or just different ones? Everyone has advice (me included) but at some point the unknown factors will way far more heavily in what happens to your plan than the known ones. I think most would agree that the plan you posted just prior to the one quoted above had many solid improvements over the one you posted first, where it was clear there were items you thought were too much and I felt there was a tone about your presentation that was kind of "OMG, how do we fit it all in and still feel human at the end?" Do you still need to improve on that plan?
I think the plan you have above is fine. I think the plan you posted just prior to this one was also fine; although obviously it was a little more fleshed out, there was flexibility in it and choices (like park arrival times on specific days) that didn't need to be made until you arrived and saw how your kids/family were managing. It seems a lot of the in-law issues that were making you stressed have resolved. If you're having a good time tinkering with your plans, then by all means keep going. But if you're not having fun anymore, which I think is where you were when you started the thread, then please take a good look at either of the last two plans, and ask yourself seriously if there is anything about them that
really bothers you or you think is unworkable. And if not, and you're not having a good time with the plans, then give yourself a break and stop.