As far as I know there are no sites that print out automatic iteneraries, because no one plan suits everyone.
I usually get the Birnbaum book, highlight what I want to see, when I want to see it, eating places, etc. then set up a spreadsheet for each park/each day listing the activities, phone numbers, and page number in the book that corresponds with the attraction. I then laminate each page, put the book and the day's sheet in our backpack and head to the parks. It takes a little time, but I enjoy the planning stage.
Even though I have a general idea of what to do and when to do it, the planning is fun! Give it a try.