Most people will understand if your group meets you in the line. Just don't abuse it. Example from 2 years ago. Woman holds place in line for 7 Dwarves. At the last minute her group of 9 more join her. They decide they each want a pic, then the girls, then the boys, then the adults, then the kids, then this family then the other family then the third family. Oh now I need a shot with this camera and then that camera oh and this phone and on and on. DO NOT BE THAT PERSON!!!! Example from this years
MNSSHP. Woman saves place in line for group (Queen of hearts) for Jack and Sally. She tells everybody that more are joining her. No problem thanks for the heads up. about 30 minutes before they get to the end the rest of her group shows up (Alice, 2 tweedles, Madhatter, Cheshire cat, and White Rabbit). They thank everybody for letting them in. When it was their turn they took 1 maybe 2 group pics and left. BE LIKE THESE PEOPLE!!! and you will have no problems. I saw them later in the evening and thanked them for being considerate of others.