We just got back and I recommend the clickable sharpie. Our plan was to buy an autograph book in the park that had the picture sleeve next to it and a pen... My boys each picked one out... and they were cute.. but the pages on one of the books was blue in color and it had a design ALL over it... and it came with a blue pen
the CM told us the autogrpahs would be hard to read.... but DS had his heart set on it so we bought it and figured we would just buy a marker at one of the stores.... 5 stores and 45 minutes later we found one at the Compass Bookstore Sundries booth in DTD... not the store but the stand in the middle of the walkway.... they had a small stock of markers.... but the stores had zero... zilch... nada. At Goofy's kitchen the characters would use our markers to sign the books at the tables around us. So take a few markers with you (in case you lose one!).