The kids are given a map with a bunch of missing roads, road names etc and have to explore the area to find the answers, or use local knowledge.
You'll need to grab a screenshot of your area in Google Maps, and then blank out some road names, entire roads etc. Example provided, but it'll be useless for you.
Give the blanked maps to the patrols and let them loose!
Note: it may be worth doing something at the same time as this, like a treasure hunt, or something to keep the kids more engaged. I ran this and it lacked "something". If you have an idea, please edit this!!!