It isn't a camping game, camping gets you nowhere, you camp in the wrong area you've wasted your own time and chances are it'll be the wrong area, it's more of a creep/tactical game, similar to R6 imo, you have to move around all the time - slowly, to gain the best advantages.
I've tried camping extractions only for them to go to a different one or approach from a different angle and I didn't see them. I've tried camping for them to leave after collecting the bounty only for them to use a different door to escape - it just doesn't work.