Power suggestions?

[86NeSSP]

What is the best way to set up one point for power to all the items in the SSP?

I am getting to the point I want to make sure they (switches, radios and other emergency equipment) are all getting power from a switched source. I want to be able to cut power to everything so that there is no way to just get in and power things on if the main is not "ON".

I know there has to be a way to do this and this point also be the location at which everything needing power also gets it.

My Nebraska car for example. I want to start hooking the PA200 up as well as the lightbar (once I get a couple of switches) and route power the same way to my CHP and Tx. DPS cars. this way the power is not in the inside of the car and cannot be turned on from inside the car making it hard for anyone riding with me to play any stupid games and turn stuff on while in route to a show.

OK, I think that is it...