I'm not a shooter, but an editor and software developer.
I had a few requests to make something that can add timecode to clips. (Since DSLR cams don't do timecode and any editor wants / needs timecode that's not practical.)
So, I've updated my QtChange application.
It now can (batch) add Timecode either in Rec Run or Free Run mode on clips that do not have any timecode.
(And it can set a lot more Quicktime params)
Of course i still believe that shooting with an external BWF recorder and using the LTC from that is a better way, but that's totally up to you :-)