There are a number of tools on the market for tracking vehicles and most of them supply much more info than a pantry or farm could ever use.
And they are all expensive monthly subscriptions.
Putting an Apple AirTag on each truck's keyring is a good solution.
It's a one-time cost of around $30 per truck (Apple sells them in bulk).
It's not as accurate as the GPS based trackers, but it can reliably show where a truck has been in the past 15 minutes, which is usually good enough.
This one-time cost is a fraction of what the other subscription-based apps cost.