Hi, me and Mrs G have just returned home and we done a Jeep Safari for the 1st time ... We also heard of the deaths whilst there, but we were unsure if true etc and no one seemed to know if it was true ... Anyway, we went for it and what a day!
You're encouraged to wear your Seatbelt at all times (we did), Driver was safe and a good laugh, you're also warned not to use your Water Gun on any Driver (which apparently was the reason for the deaths, as the Jeep overturned when the Driver tried to dodge another Jeep) and we felt safe the whole day.
Don't let it put you off going, it was the best trip we've ever had!