Thanks for the suggestion, @keith. To be clear, what I want is that as a user searches for their address to enter it, the list of matching addresses only includes city and state. As I won’t have a list of all states and cities in my database, I believe I do have to use the Places API, unless I’ve misunderstood your suggestion.
Since posting this question, I have found the following http://forum.bubble.io/t/geographic-location-search-limitations/22299/6
I’m going to give this a go.