GaryO ,
As others have asked what type of budget do you have?
I run a few cams some self made out of Sony digital cams but these only are capable of stills and have a white flash which would give the game away.
I also run a couple of commercial cams have tried a few different brands but keep coming back and using a Lil acorn
Can set up for stills ,video or both with length of video how long between shots ect.
These cams have great colour day shots in both video and stills and night shots in black and white.
Black flash and infrareds fore night shots and pick up noises through the microphone.
as with all things there is always someone who wants your gear so I mount mine in a tree pointing down to feature I want to capture deer trail preach tree ect.
as most people don't tend to look up when surveying an area.
Not saying that it guarantees you may not loose it but a bit of camo around it so it doesn,t stand out like the proverbials , been very fortunate myself and have never had one go missing,
Heres a link to the Lilacorn site for you to have a look at also a link to another site with plenty of information on both commercial and homebrew cams, have not bought a commercial cam for a far while as I have to many H/Brew cams as it is and prefer to make my own up .
www.ltlacorn.com.au
http://www.hagshouse.com
Hope this helps
Regards Andrew
Edited to note these are movement and heat sensor cams