I have a whole kit package that includes the Safari Camera Controller, Opto Backpacker, Flash Backpacker, battery holder for control board power,HPWA, and external mic that is needed to run the JZ250 video build. You can find it here: http://rcdavisgamecamerasolutions.weebly.com/
You will also need a slave flash ( I recommend the Vivitar 2800), battery holder for slave flash power supply, a build case at least the size of the Pelican 1060, a snorkel, 1 1/2"shutter glass and flash glass if you intend to have the camera flash shoot through the case but I don't recommend doing that since the JZ250 flash is pretty weak so not of much use. No need to drill an extra hole for it in my opinion. You will also need servos unless you will be hardwiring everything. I have everything you need except a snorkel which can be made with a pvc pipe cap or whatever you have that will work.
"No need to drill an extra hole for it in my opinion"......... Hole for the flash?