Had a suspected engine problem a few years back and diverted to Redding, a quiet place in northern California. I didn't declare an emergency but I did stay high as a precaution and circled down over the field. The firetruck followed us down the runway. Had a shop look at the plane while we did some tourism, they declared everything OK. Even so the firetruck followed us down the runway on takeoff too. I suspect things are pretty quiet in the Redding Airport fire service.