On my second safari, to the Okavango in Botswana for lion, buffalo and sitatunga,, I did in fact spend quite a few hours without the company of my PH. He has now passed away and some will know of whom I speak but I wont say his name here, no point, whats done is done. I was in a makoro with just native polers for several days hunting sitatunga amongst the crocs and hippos, which were seen frequently. I also spent time on a sit over a dead warthog waiting for a lion to come with me and one tracker. The male never came, but females were lurking within sight.
Tracker was armed with the PH's double .458 Win. PH was back at the car reading if I recall. Said he would pick us up in a few hours or if hostilities commenced! Never really occurred to me at the time to question this, seemed natural enough to me, a young fit guy in my mid 30's. More balls than brains!
At any rate nothing bad happened, got the buffalo, got the sitatunga, flubbed the lion, my fault and PH was there. The story of that whole trip is here somewhere that I posted some time ago. I have only fond memories of that trip, other than flubbing the lion, very embarrassing indeed!