Security cameras

I’ve always had this problem with possums eating my roses in the middle of the night. There are telltale signs that indicate the possums are the culprit but I’ve never actually saw one. I think what I need is night vision cameras to be set up in the backyard to capture these pests but I don’t know where to start. Maybe I should start looking at places that sell security cameras; if they can’t help me then they might be able to point me in the right direction.