Ok, so I had my lesson already to go, worked on it a lot on Sunday and then decided to scrap the whole idea! I'm CRAZY! The problem with the original lesson was that it was really a waste of time for any 5th grade class to do, because it didn't really help them learn about their geography. So, I switched it up.
Here's the new deal. Our assistant principal is putting together a "fun festival" for next fall. He's charged the 5th grade team with putting together a concession stand. He's given them a budget (which I haven't worked out yet) and a list of items to buy. The students will have to search online databases for prices of different items to determine whether the given budget will be enough (which it won't). They will then have to write a persuasive essay in the form of a letter to our AP make their case.
So instead, social studies, the focus will be on math and language arts.
I like this idea much better and now just have to work out the logistics.