guys cmon - a wireless camera? lets think about that...
a) you are talking about a bigass battery for 12+ hours of continous footage,
b) that video has to be compressed and stored somewhere - many ways, but when you start talking about 12 hours of continuous footage, that is 5+ gigs required. So they either hide a laptop in the trees or transmit wirelessly at a pretty high bit rate...
c) so its pretty expensive, and your local drug czar is going to justify this expenditure to stop the grower of one plant?
Then the people factors, never mind the fact that every arrest has paperwork - contrary to belief, police are just as lazy as us all. If they are not going to get big props for a bust and they are not under quota, they are not going out of their way to make more paperwork for themselves.
Then there is the person whose life decisions have landed them a job as a pro lawn mower. This is not the person you have to worry about reporting you.
So go back, rescue your plant, and if anybody approaches, you could start tearing it up. Proclaim you are doing your part to "fight terrorism." If they ask what you were doing when they walked up, state that your were confirming the "suspect plant's identity" before destruction.