No, don't waste your money and use up other guests' FP+.
I've experienced Disney World during Christmas/NYE week four times in the past five years. As a result, I'd consider myself pretty capable of answering this question.
Christmas, New Years and July 4th are the most crowded times at WDW. During this past year's trip, MK saw a Phase 3 closure three times. I'm not sure how Easter compares to Christmas, but if it's anything close, I can assure you that you will not need 6 FP+ -- just a solid plan!
On Christmas I read everything I could get my hands on about FP+ and MagicBands. I'm in advertising, so aside from it being Disney related, I wanted to read up from a creative and business perspective. As a result, it left me and my family prepared and ready to plan the perfect trip.
At the 60-day mark I booked our FP+. I booked mostly morning/early afternoon FP+ or evening. The parks usually get incredibly crowded by 12pm or 1pm. As a result, we wake up early and get to the parks as close to Rope Drop as possible. On Christmas day, we get to MK for the last half hour of the morning EMH (we can't bring ourselves to wake up earlier than that!)
When we arrive early in the morning, we have our park app handy with the ride wait times called up. Let's say we arrive at 7:45am for EMH, and the park opens to public at 8am. Here's where the planning comes in Knowing the history of the crowds from the crowd forecasts and previous years, we know that most rides will be below a 30-minute wait from EMH (7am) through around 30 minutes after opening to public.
So, we know that we can ride Space Mountain in as little as 20 minutes. Okay, Space Mountain is easy to get to right after entering the park. A 20 minutes for Space Mountain on Xmas Day is unheard of, so no need to book that ride for FP, cross it off! As a result, we book the Buzz Lightyear ride (because that's one of the few rides my mom will go on and we can go on as a family) Thunder Mountain and Peter Pan.
Back to the plan... So we get to MK at 7:45am. We check the app and as expected, Space Mountain is a 30-minute wait. But we know it's in reality much shorter. My sister and I make a b-line to Space Mountain, leaving my parents behind. We're on and off the ride in 20 minutes.
The park is now open to public.
We have not had breakfast yet, so we decide to head to Gaston's for a cinnamon roll. On the way, we stop by It's a Small World. The wait time is 10 minutes (a quick note - always deduct about 5-10 minutes from continuous-load rides - Pirates, IASM, etc.) We're on and off IASM in about 15 minutes. It's now around 9:30am. We head to Gaston's. Fortunately, the park isn't incredibly packed yet. Maybe guests have not yet made their way to the back of the park. We sit down and eat our cinnamon rolls.
Now it's 10am and we have a FP+ for Big Thunder Mountain. My sister, dad and I are on and off the ride in around 10 minutes.
We have an 11am FP+ for Buzz Lightyear, so we have some time to kill. The app says Jungle Cruise is a 30-minute wait. For a crowded day, that's incredible. We head to Jungle Cruise and are done by 10:40am. We see that Pirates is a 25-minute wait. We ride Pirates and are done at 11:15.
Time to redeem our FP+ for Buzz. We head back over to Tomorrowland. Buzz standby is now at 40 minutes. Across the way we see a 100-minute wait for Space Mountain!
After riding Buzz it's now 11:45am. We have a 12pm FP+ for Peter Pan, and it's a good thing we do because standby is 75 minutes. We ride Peter Pan. By 12:30 the park is swamped. Sites report that MK is at a Phase 3 closure. It's evident by the Small World line, which extends to the Haunted Mansion!
We decide to head back to the hotel. We take a break before heading to dinner later that afternoon, then end the day at Magic Kingdom for the last hour of public park hours and the two hours of Evening EMH.
With a two year old, taking a break during a crowded day (or any day for that matter) is going to be inevitable. Get to the park very early each day during your vacation. Once it starts to get crazy crowded, go home for a nap or to relax. You can return to the park later in the day if you'd like to.
I promise - as packed as it may be.. you will be fine. Just plan ahead and use these tips:
- Take advantage of EMH
- Leave the park around 1pm - it will be too crowded
- Get to the park as early as possible. I'm not sure if people were opening gifts Christmas morning or what the reasoning was, but we basically walked on rides until 10am.
- Don't be a "sucker" for the new stuff on Easter Day. Stay out of Starbucks, avoid Fantasyland and "exploring" the new areas. Save that stuff for a less-crowded day (the day after or before) or during EMH. It will waste the time you can be using to go on rides and it's a tourist-crowd trap. Everyone will flock there when entering the park - don't be one of them!