Yes, you need TC connected all the time as the internal clock of the 5D drifts horribly.
(You know they get hot, probably causes that...)
But you only need the first few seconds of each clip to have audio timecode, so you could start record and disconnect.
But since it is a very simple audio signal, any half decent AM/FM transmitter / receiver will do to distribute the signal wireless.
So you could use Jumpstart with a transmitter / multiple receivers and there will be no need for Lockit boxes.
And you can of course use cables.
It highly depends on the kind of shooting you do to decide what's best.
Do toy with it, i can send you some audio timecode if you like.
(Do specify the framerate though...)
Bouke
http://www.videotoolshed.com/
smart tools for video pros
