My two cents . . . I am a Touring Plans die-hard fan! When I 1st stumbled upon them in 2007 I was a bit concerned on how they had me jumping back n' forth around a park, but I quickly realized they knew what they were talking about. I would rather be walking to an attraction vs standing in a line for the same amount of time. Walking makes me feel like I'm "doing" something.
More to the point about crowd calendars - Yes, nice to know what people predict the crowds would be, but honestly, my vacation days are usually not flexible. I am at the mercy of the crowds regardless, so I tend not to worry so much about the crowds on a particular day, but instead focus on how to best navigate through those crowds. That is where I find touring plans wonderful!

Yes, I've been to the parks many, many, times and could likely design my own plans, but I like the options TP offers and tweak them to my own trip.
Good Luck to you!
BTW,

to LSUfan4444!!! Fellow LSU graduate here! GEAUX TIGERS!!