I love to hear that you are trying to incorporate field trips for your students. I'm Emma Ammons, currently a Junior at Wartburg College. I also remember many of my class field trips. Some of mine included attending a Driftless Regions Wildlife Preserve, specifically the Wetlands Center in Marquette, IA. We learned about native species along the river, did sampling, identified animals and footprints and more. Some others were clean up or hikes through the State and Local Parks in our area, like Pikes Peak in McGregor, IA and Effigy Mounds in Harper Ferry, IA. Most of these also overlooked the Mississippi river. I believe my school went to Dubuque for another water-based field trip. I think an interactive museum, or park place. Field trips are great ways to involve the students, if you can get them outside, go for it. Check out parks and preserves near you. Otherwise get in touch with boating docks, factories, wineries, places that might have different STEM principles and provide new opportunities for them.