Here's how to work the bus line with a stroller. Keep your child in the stroller up until the time the bus gets there. Have all your stored stuff already in that bag. When you see the bus, remove your child from the stroller, fold it up and board the bus. There is nothing worse than being behind the family that has a huge double stroller, and decides that the time to fold it up is just prior to boarding the bus. If you decide to do that, please have everything removed, then one person can stand aside and fold it up while others board. Don't expect others to stand behind you, happily waiting while you tend to your stroller at the door to the bus.
Also, please don't try to board through the rear door!!! I can't tell you how many times I saw families go to the rear door and expect to board there. I've seen a child board, while dad tried to get the stroller on, but that rear door closed, leaving dad outside, ds inside. He was not a happy dad!!!! But, the doors will close, as soon as the guests that are on the bus have gotten off.