The most important piece of any solution is that it is easy to use. While a tech-savvy person will be comfortable using location spoofing apps. Most people are not that savvy and are not super precise with their behaviors. I already see the user error followed by the question from the kids: Why did Dad's location jump from Brooklyn, NY to Brooklyn, TX?
Stick with the toolbox in the trunk or the faraday bag
Stick with the toolbox in the trunk or the faraday bag