There will be more than one bag check line, you can go into any of the lines that you want. A hint...don't simply choose the shortest line based on number of people being checked.....look ahead...the family with each member carrying backpacks and another bag in their stroller will take longer than the family with Dad carrying a backpack and the rest of them bag free. Once you've made it through bag check you will then get to again choose another line to go through to scan your ticket/magic band to enter the park. And again, you can choose whichever line you want.....my preference is to choose a line with the least number of small children. Love kids, have two of my own, but honestly, the process of bringing your magic band up to the Mickey head and watching it light up, just plain takes longer with little kids (and newbies who have no clue and have to listen to CM and ask questions, but you can't always spot them as easily, as the little kids). It's really pretty easy to tell what you're supposed to do when you arrive....because everyone else is doing the same thing, so follow their lead, plus there are plenty of CMs and guards directing people. I know it sounds like it's some long drawn out process what with two lines to get into before you even get into the park, but Disney does have it down, and it typically only takes a few minutes. The longest wait is because the park hasn't yet opened and you're waiting for the CMs to start letting people in!