I was on a game catch in Namibia once and we caught and moved 13 giraffe IIRC...did it just the way you are talking about, plus a light tranquilizer ( don't want to knock them out per se, or they'll die.....just made them dopey and covered their eyes.)
It was great good fun!
"...the left considers you vermin, and they'll kill you given the chance..." Bristoe
