If I still ran cameras, I'd check them whenever I felt like it. I'd also let the deer know I was coming by riding a four wheeler right to the camera. I wouldn't give it a second thought that I may run the deer off, they would know my routine as well as I would. The last thing I would try to do would be to try sneaking into the camera every 3 or 4 weeks. That would be a guarantee to scare the heck out of every deer I bumped into. Ever notice how deer are not at all afraid of a farmers equipment? I would want them that used to me.
Back in the day, the best way to get deer in front of a BEC was to drive to it, rattle the bait, make a bit of noise and leave. Deer show up within the hour.
I may put a cam up over the corner of a beanfield that I will be hunting on opening day, but I may not. If I do, I'll check it in the middle of the day, as often as I feel like making the drive.