I am a field engineer for a dental electronics firm.
I spend hours and hours driving all over the North of England and Scotland. I sometimes do a thousand miles a week.
I have never had a speeding ticket.
I use common sense. I don't go over 79 on a motorway, even if there aren't any vans or cameras you can't tell where an unmarked car will be or where the marked Traffic Plod might be waving the laser frrom a bridge or slip road. I stick to 30 around town.
A Roads are the place you will usualy get nammed, they have lots of places for a traffic Car to sit with a laser out of the window and the camera vans usualy hunt on them as well.
If I am going to an area I am not familiar with I have a look on the local police website to find their mobile enforcement sites, most of them tell you where the vans are enforcing on a given day. I know where the fixed cameras are.
It's not difficult.