Now see, that sounds like fun, your daughter will be with some of her friends, you will have your sister with you, and that will make up somewhat for the fact that you will be trying to keep up with a bazillion kids that you don't know in a place you have never been.. just kidding! More than likely, you will be scheduled to see specific things and would not be expected to know your way around. I know I always felt more comfortable in elementary school on field trips when we went places because I was familiar with most of the spots. Middle school was different, more kids, different parents, bigger groups, but they are still KIDS. I hope you have wonderful weather and you and your sister and your daughter have a great time!