I have seen vets walk from their truck and dart a rhino. Not my cup of tea as a lifetime hunt.
Interesting.
I did a dart hunt a few years ago in South Africa and it was not at all like that.
The effective range on a dart gun - at least the one I had - was about 35 yards, and getting that close to a group of rhino was a challenge, to say the least. We had to play the wind, make sure to stop moving when they stopped moving, and find decent cover because although they don't have great eyesight, at 35 or fewer yards, they can see you.
And then once you hit one with the dart, you have to find it - quickly - to partially reverse the drug (no helicopter here). It takes off like the proverbial bat out of hell and you can (and have to) chase, but it's not easy - they - or this one at least - went into thick cover.
When we were done with pictures, and some vital statistics, the vet allowed me to inject the reversal drug as well, which is fun - you need to get back relatively quickly, because it works faster than you might expect and you will have a drowsy but not entirely happy rhino on your hands when it gets up.
Overall it was an exciting hunt, and far more exciting than shooting one with a rifle would have been. I could easily have taken a shot at 100 or more yards, and likely brought the rhino down a lot faster than the dart did.
I'm not saying darted hunts are all like that, just that mine was. I would speak to a good outfitter who offers these hunts and tell him what you want. It's not fish in a barrel.
And FWIW, many outfitters will let you deliver the actual tranquilizer, rather than the vita-dart. Not sure it's entirely kosher, but . . .