I basically decide on my own using some tricks i've learned.. for medical reasons we don't really stay too long at any park (maybe 3-4 hours on average but it varies) so some of this is when you want to hop in and out of certain parks. I'm also not a rope dropper and generally we're in that pack that comes into a park for early lunch but we also can close any park down.
Things i've observed:
- Friday afternoon - sunday night everything is more crowded.
- sunday night if mk is opened late is a dream but the day isn't uncrowded so it's a great use of hoppers. (but don't go in if your looking to linger in the hub for night shows, thats where the crowd is).
- if any park is opened 2 hours after it would be dark that time of year, disney is expecting a really big crowd that day.
- if any park is closing with fireworks or the night show right as it gets dark that time of year, the crowd is not expected to be huge but it'll be a nice crowd where all rides will have some type of line instead of later nights where lots of rides will go walk on.
- any weekday (mon-thurs) that a park is opened much later than the rest of the week, that park is expected to be swamped.
- if only 1 park is opened late, there is going to be a lot of people hopping to it unless it's closing within an hour of other parks.
- if 1 park is opened late and another have an evening emh just roll the dice which is better to be at and it's a great day for the other parks that are closing sooner with a late dinner at springs.
- mk is crowded on mondays, always packed on mondays.
- if you like the street performers in AK, go in the evenings, especially when ROL is running, people tend to all be back by EE or safari making it a really nice evening strolling around and taking in the entertainment. while the first show is happening, EE is a walk on, as it ends, it'll no longer be a walk on for the rest of the night.
- if all parks are closing roughly the same time and earlier in the night, springs is going to be crowded but not impossible (if park to springs hopping, you'll be waiting for a few buses before you get onto a crowded one but springs itself won't be too bad to walk around but impossible to get a dinner spot without an adr.).
- early morning emh makes for very empty evenings but only after the fireworks or full set of night shows end when famillies decide it's bed time. popular rides tend to be more crowded as families aren't the ones that stayed but all other rides are pretty much a walk on so plan accordingly with your ride strategy of when to ride what.
- most parks have the highest crowds in the afternoon except AK but that's because the sun is trying to fry you like and egg so if you don't like to feel that way, avoid ak
- epcot future world has the lowest lines once everyone makes their way into world showcase for dinner.
- most families clear out by 11pm including some teenagers and young adults so parks opened past midnight tend to be great unless it's friday or saturday.
- rides are impossible in epcot during evening emh but world showcase is very empty (and most of it closed) with people getting out of there after illuminations.
- food and wine or flower and garden eating around the world tends to be emptiest after dinner time on weekdays (mon - thurs). if your see massive lines in the app for any park, it's not going to be empty when peopel give up and head to epcot.
- minigolf closes at 11pm if you want a nice night game when all the parks are closing early. it's also a great time for family movie night at springs.
So what do we do when spending a week? we get all the parks things we care about done in the first 24-48 hours, then we go where we feel like it. after that and if we're not ewnjoying hte park we go to another one. I randomly get fp+ ahead of time knowing which parks we tend to just not hop to normally and lots at MK because we almost always end up there somewhere during the day.