Take a look at the Covert MP6 or the Covert MPE5, the MP6 will let you take the delay down to zero which is great on trails. If you are setting up where a longer delay between pics is ok (such as a feeder or minerals) then the MPE5 might be the route to go.
I have a MP6 and love it, takes great pics and I have changed the batteries once since August 2012 and that was in late June of 2013, the camera probably took 12,000 pics on that set of batteries. Daytime pic quality is outstanding, night pics are good if the subject is 30 feet and in, much past that starts to lose some. If you need more flash range the Covert Red40 is very good but runs more money.