First one was stolen when I was ~15. Camera ran on D batteries and a roll of film. Less than one week after I got it, private ground in Renfrew, PA. Big middle finger to the d-bag that did it.
For about the next decade I cursed the things. Finally got another a couple years ago and been building a collection ever since. I have had two destroyed by bears, and one destroyed by ants. All of them are on public. I am rather paranoid about having them stolen to the extent that when I first got them, I couldn't even get good photos. I've since struck a balance in that I have some good setups, but they are very, very carefully chosen. These are some of my rules. Sounds like based on your questions you are on to most of the basic concepts.
Timing...Avoid bear opener through end of rifle season. Statistically this is when vast majority of hunters are in the woods. I also avoid turkey season in most areas just because it's a risk with no real payoff, bucks are barely sprouting antlers. Archery and small game seasons vary, situational awareness is key.
Traffic....Avoid high traffic areas. Period. A lot of areas I hunt are remote, and I am paranoid. There are some tracts of public I would consider putting a camera out on public a donation to the scum. I see you are from Pittsburgh...I know "victim shaming" is a foul these days, but I know a lot of public land around the 'Burgh, and I would consider anything within an hour "asking for it". Definitely no easy access trails or roads. No gamelands food plots. No scrapes in open areas. Especially September - May, when most guys are in the woods. I have a few spots I know I can be more bold in the summer. Virtually no one goes into the woods in the summer off trails.
Locks...I don't lock mine. The cables stick out like a sore thumb and if anyone really wants a camera, it isn't stopping them. Side story....I am out in the woods the day after Thanksgiving this year and come upon a group of dudes. I recognized one of them as a guy that passed a camera I placed the previous spring, and in doing so broke my own rule and made it too easy to access. He didn't take my cam, but cheezed for it in a humorous manner, so that was cool. As we parted after some small talk, I realize one of them is carrying a bolt cutter...I'm like what the #. Is there any legitimate reason to be carrying a bolt cutter into the woods? But the one guy had left my camera alone 10 months earlier, so I said whatever and carried on.
Break up the outline...Anyway, most of the time I hang mine in trees where surrounding branches will break up the outline. I carry a couple climbing sticks to do so. I like the vantage point from about 10 feet up better too. Other times I will mount it ground level but use branches or build a "nest" to break up the outline. I buy cameras with muted natural colors and use a sharpie to draw an ASAT style pattern on the housing and straps. At 20+ yards, this makes a tremendous difference, I've done side by side tests.