Thanks, not bad :-) You triggered me to remember that Magic Lantern supports remapping of the "REC" key. I've remapped it to the "Shutter Half-press", and with a wireless remote I can start video with a key-press. FYI - I'm using a Canon 550D, and the gig is to remotely shoot video of a sports event, from a location where photographers are not allowed.
In other words you just admitted that you are planning to film the event illegally.
Well, Mickey..In return for jogging my memory, I'll gratify you with an answer.The sports event is none of your business, but there are no restrictions on photography/video, as is common in Europe, those restrictions are a US exclusive. One of my daughters competes at a national level in this sport. The best spot is center stage (center mat), but unfortunately that's where the judges are sitting.So a camera with a 14mm, placed in front of the judges, below their line of sight, is the sweet spot. Which is why a visual indicator is not a good idea, it would distract the judges. Hence the radio need & the need for distance. 'Cause I'm busy taking pictures from the next-best-spot.
The way I read your statement was photography was not allowed where you wanted to place your camera.