I am having trouble with the game called Simpsons hit and run for nintendo gamecube?

I can't figure out where the Kamp Krusty is located at. I need to go there to purchase the school bus. It said that I will need the school bus for the next mission, but I can't find the Kamp Krusty place where I need buy it. Please help me buy telling me where is it by or a link that has a map that I could use. Please help me as soon as you can.