In that case I would carry the .470 loaded and let the bearer carry the 9.3 unloaded.

My rational being this, that in either a SHTF situation or a sudden appearence of a fine PG trophy...say Kudu, it will then be at a short enough range for the .470 to do the job. ( I have shot Warthog to Wildebeest with a .450 #2 out to 90 yds)
If a fine trophy is sighted at 150 yds then you would have time to take and load the 9.3 if you were so inclined.

If the simple question is would I let an inexperienced bearer carry a loaded and cocked double, then no.

Regards