Sounds like a pretty small town. Are there any specific landmarks? Is there anything open at night? Is it the type of community where you might want to go door-to-door to ask for stuff?
It could be fun to have the girls hunt for a list of ingredients at different locations and "neighbours" to bake or cook a "mystery" treat. When they have all the items, they have to bring it back to the house and cook, bake, mix, whatever and then you girls could have coffee and enjoy the spoils.
eg. The exact ingredients and supplies, including baking pans to make chocolate chip banana muffins.
They might have to borrow one cup of flour here
1/2 a cup of chocolate chips there
a muffin tin here
They wouldn't know they were making muffins, but they would have the exact ingredients and would have to figure out what to make with those ingredients and baking items. Of course this would only work if your girls were knowledgeable with baking. This is just one thought.
Back to my original questions... Do you want to include cameras or just search for items? Any extra info would be greatly appreciated.