I don't take mine into the parks. I do, however, do a version fo the "index card trick." I duplicate all my info from each PassPocket onto a large posty note which I stick to each pocket during my preparation at home. Before we leave our room I just remove that day's posty, fold it in half and put it in my bag. When I enter the park and pick up my guide map I just unfold the posty and stick it to my map. It stays there as handy reference for my PS's and must-do attractions and tips for the rest of the day!
For me, my Passporter is more of a planning and organization tool rather than a "touring guide." My family refers to my deluxe passporter as "The Tackle Book" because if they EVER see me lay it down unattended they have permission to tackle me! That's because the deluxe binder is perfect for all my important documents, ID, credit cards, cash, etc. Literally my entire trip is in one book and it spends all of it's unattended time in the room safe. (Hmmm, I better not wear a name tag at Mousefest this year or you all will know who's passporter to "make off" with to seriously increase your souvenir budget!
) Anyway, it fits perfectly in the room safe and I don't worry about misplacing anything important in the myriad of pockets in my carry-on.