To anyone who has been to a show

Hey guys. I'm going to the Philly show on Saturday and I was wondering if anyone knows the answer to a few questions if you've seen them before. Do they usually have an opening act? The show is supposed to start at 9:00 I'm wondering what time they'll most likely come on. I know with Hanson that would usually mean about an 11:00 start at least. Also how long do they usually play? Do they hang around and take pics/sign autographs?

My boyfriend is disabled and I don't drive so we'll be scheduling rides to and from the concert on the paratransit bus service AccessLink and I just wanted to be sure we give ourselves enough time for the whole show before we get picked up.

Thanks for your help!