I am surprised at the degree of attachment many seem to have to their own guns. I suppose I shouldn't be so surprised though as this is, after all, a gun nut forum.
A safari is a difficult thing to organize and guns just make it more so. I say leave the gun and hassle in your gun safe at home an go to your chosen country and borrow a gun from your ph. They usually have a variety to offer and very cheaply.
You can certainly do it that way, but it adds a degree of uncertainty to what represents a pretty big investment, so its not how I would recommend doing it. Depending on the safari company, you might end up with a a better rifle than you could hope to own yourself, or you could end up attempting to hunt with a club that is totally unsuitable for you or for the task you face.
In my case, I didn't find out about in-transit permits until it was too late, and our travel agent booked us through the States. I didn't want to risk loosing an expensive custom rifle, so I left it behind, and I gotta tell you; I felt sick about it.
The PH had a John Wilkes .500 Nitro Express double rifle for me to use. That rifle oozed class and would have easily been equal to the cost to a new 4X4 with heated leather seats. But it wasn't the gun for me, and frankly I wouldn't have traded my Brno ZG-47 for it, never mind my bear gun. Lets just say that it was fortunate that I had some experience with big rifles, because the 100 year old rubber recoil pad on this thing might as well have been made of poplar; yes it was softer than the walnut stock, but it was close thing. After a short test drive, I'd had enough shooting for a while. Me and that rifle didn't see eye to eye, and frankly I was turned off doubles for life after hunting for 10 days with it. The rear sight was a narrow deep V rather than a shallow wide leaf that one tends to expect in a modern express sight, so it was nether fast or precise. At close range the .500 was alright, in fact it was right comforting in the tall grass with a herd of buffalo, but did I mention it only had 2 shots! The loads for it (89 grs of 3031 behind a 580 gr X bullet) were heavy enough to make the action stick, and due to my inexperience with doubles was often slow to reload. It had extractors instead of ejectors which did nothing to endear it to me either. By the time I had developed some degree of comfort with it, it was time to go home.
My saving grace was our companion client who was very generous with the use of his custom shop M-70 .375 H&H. I was usually much happier when I packed that rifle, but it too had an issue. The custom shop part of the rifle was that the LOP was for a long limbed guy who stood a head taller than my 6'3". It is possible to shoot a rifle with a 16" LOP, but chances are if you aren't built on the particularly long side it will shoot low for you. It did, and I didn't have any opportunity to shoot it other than at live targets, and I certainly wouldn't have been able to adjust the sight to my advantage. I finally got it figured out though, the bullet would usually strike midway between the cross hair and the top of the bottom post. My wildebeest and my buff, the first two animals I took, were all hit too low, but the impala and the warthog were bang-flops, although in truth the impala was hit lower than I intended, but it was a heart shot. The shot on the warthog was a bragging shot, as it was running full out, 150 yards quartering to my right, and I dumped him with a left hand shot. He never twitched.