Agree you will need to split up. It is too far out to do detailed planning, but you could start making a list for each member of the family. Tell them they get to pick a "top 5" things they want to do/experience. It could be a certain ride, show, restaurant, just pool time, etc.
As the next few months go by, you can tweak the list if needed. Have the kids watch
YouTube videos from some of the big vloggers. It would give them better ideas of the atmosphere and rides.
Everything is crowded so your husband should probably watch some videos himself. Just so he is prepared visually for what it may look like. February isn't a crazy month, but I asume you may be going around Presidents' Day weekend? If that is the case, it will be crowded for sure.
I'd just start with the lists and make a budget. All those extras will add up big time and Park Hoppers are big money too. PLUS, you have to tap in to the 1st reserved park in order to get to the 2nd park later in the day. You can't hope that will change and then be disappointed.
And I agree with husband, take rest days where you do nothing but lounge and go at a slow pace. There are TONS of things to do that do not involve parks.
Hope everyone cheers up! You don't want to spend a ton and then no one enjoys it. Good luck!