[Al Skierkiewicz]

Ben,
I have to go along with Greg here. Wireless ignition systems are notorious for false triggers unless the system is very sophisticated and uses a data stream with error checking for ignition. Most of the systems I have seen are as you describe, wired with key lock and dual arm switches. This is the type of system used by Hollywood special effects guys and fireworks operators.
The KB9WTE at the bottom of Greg's signature is a good sign he knows wherefore he speaks on wireless.
Al, WB9UVJ