Wow.. we have never paid anything for a field trip. Today my 11th grader went to a museum for two lectures and some free time. She brought her lunch, but could have purchased her own. She has also gone to states for Science Olympiad twice and only paid for food when they chartered a bus. The only one we pay for is the DC 4 day trip. Everything else is covered. They have gone to lunch at a Japanese restaurant, pumpkin patch, various museums, local plays and shows, college fair.. I never really thought much about it. I'm sure we pay for it one way or another.