Lyle,
If both your cameras are perfectly time synced,
and if you rename your files upon ingest using a time variable,
such as {hour24}-{minute}-{second}-{subsecond}
then all your files, when sorted by filename, will always be displayed in their proper sequence. (assuming you ingest all images into the same folder, or view several image folders together)
This way you have a way to quickly see your whole take in sequence, and later, after the rush of deadline, etc., you can rename with sequence if you so wish.
The only thing about the {subsecond} variable is that I read that some cameras don't support it.
best,
Nati