I used to live in Glen Avon, which is only about 5 miles from the old steel mill.
Fontana was just a smoky blob on the map. People that worked at the mill lived in little tract houses scattered around Fontana and Ontario, and Pomona.
We have been going to Fontana since it first opened. Saw Jeff Gordon win the inaugural race there. Got David Starr's autograph there. Among others.
Fontana is a big, sprawling facility!! Tons of parking and that infield must have room for over 500 motor homes. At least!!!! Garage area is gigantic!!!
Most often you cannot get access to the garage area, that would be in front of the road to the backstretch. Only motor homes are allowed to enter that infield via that road. And, of course, VIP's! LOL
There is no "metropolitan" area close to Fontana. Lots of truck companies and businesses. We have NEVER had a problem getting to nor from there any year on any day, Friday, Saturday, nor Sunday! Nice, fun, big place!