TP crowd calendars are garbage. As late as May 4th they said Hollywood Studios would be a 1 on Sept 3rd. The fact that they would publish that means no one should ever pay any attention to them.
When you say crowds you have to specify what you're looking for. If you want low crowds then go in off times like mid-late April [after Easter], May before Memorial Day, September, and January and February outside of some big events like the marathon or holidays like President's Day. If you want low wait times then you're probably better off going during a "busier" time because the parks will be operating at full capacity. As an example you can run 2 sides of BTMR but during low crowd periods Disney will often run just 1 in the morning. That means they're reducing capacity by 50% even though the crowds haven't been reduced by 50%. It's also why 8am opens are better than 9am because less people will get up and go to the parks that early.
If you want a simple calendar look at Disney's
ticket prices. Cheaper days will have less people but that also could mean waiting more. If you want a calendar that's a little more involved take a look at Your First Visit's
Crowd Calendar and
ranked weeks. Apparently the Dis doesn't like Dave so you have to Google it yourself. You should note that Dave's site is obviously catering more towards first time visitors but a lot of the advice holds true even if you're a returner and he will point that out in his posts.
Some people get into a negative mood over things and never get out of that, which will inevitably lead to a disappointing trip. Have fun!!!
