You are lucky if it is only a couple of calls a day. The DR method is the simplest, and easiest way of dealing with these. Even a greeting such as "Thank you for calling XZY company, our hours are 8am to 5pm, Monday through Friday, we're located at 1234 Main Street, Chicago, press 1 for our receptionist".
Keep it short, make it seem as if you are providing the callers with information rather than obviously screening the calls.