This will of course never be underminded by aggressive marketing

Rote classification doesn't require AI. You described a SELECT statement that was developed half a century ago

Pseudo SQL

  select l.id, l.name 
    from locations as l 
    where l.type = 'amusement_park'
      and exists (
         select id from locations as l2
            where l2.type = 'rv_parking'
             and distance(l2.geo, l.geo) < $nearby_distance
      )

But what we should have is a good map software where you could filter by type and distance (How many amusement parks can be in that circle?) and quickly check if there's a RV parking nearby.

The hard job is collecting the data.