I am down to running all mine in the fall over community scrapes. I want to learn from that hunting season data over time. These are annual scrapes that are there every year, on heavily traveled corridors, within or just outside bedding areas. I hunt low density big woods, so if there is an area with some sign I am unsure about, I'll hang a camera and just let it go through the season and see how it worked. Found a couple new areas like that last year. I put the first 3 out yesterday and have 3 more to get out.
No set time but I like to leave them soak at least 6 weeks. I'll change cards during the season as I hunt those areas, then pull most of the cameras for rifle season to avoid theft, then I'll put some back out after to try to find survivors. These are all areas I hunt or plan to hunt so I really want to minimize intrusion.
I ran summer cameras for a couple years and just wasn't getting any info of value in comparison to the cameras I was losing to weather and bears.