Lets assume that you are lucky enough to be on safari with 2 DR's of your choice. In my case it would be a 9.3x74R and a 450/400 both with QD scopes.

If you want to have both rifles available at all times, then "somebody" has to carry one while you carry the other. Question: do you trust the gun bearer enough to leave the DR he is carrying loaded? Or do you leave it unloaded?

With only one DR and a bolt action backup this is simple, you carry the DR and the gun bearer carries the bolt with an empty chamber and a full magazine. But what to do now that you have 2 DR's?