Like snapper1982 said, depends on lots of variables. Use of attractants, funnels, how the property lays, how much you want to disturb the areas you are hunting, etc. I like lots of cameras. I split the farm up into 5 chunks. I have 10 cameras, so I will take one of those 5 chuncks and put about 5 cameras on it at one time. Like 150 acres or so at a time. Leave it for 2 weeks in the preseason then pull them all one day and move to the next chunck. Find my 2 biggest bucks on the farm, then I stay out!