Hey Russell!
There are some days that may have lighter crowds than others. The crowd level can depend on the time of year and if there are any special activities going on such as marathons or sporting competitions.
During your trip, it will be the summer and every park will have higher crowds than if you visited just after the Christmas holiday. I would suggest starting each day as early as possible. If you're staying at a Walt Disney World resort, take advantage of the morning
Extra Magic Hours. You'll have access to the theme park an hour earlier than those who are staying off property. Theme park crowd levels tend to pick up around 11am. By this time, you should be able to enjoy many attractions or shows without a
FastPass+ or long wait times. On the days that you visit the parks early, be sure to schedule your FastPass+ selections for night time hours.
If you're not staying at a Disney resort, I still suggest getting to the theme parks as early as possible. Not only will you beat the crowds, but you'll also beat the summer heat.
So overall, the summer months are going to be busy. No matter how you schedule your Disney days, just know that starting your days early, enjoying attractions during parades and fireworks, and scheduling your FastPass+ during the evening hours will help you to miss the crowds and long wait lines.
Russell, enjoy your time at Walt Disney World! Please visit with me again, if you have more planning questions! I'm happy to help!
Korliss