Well, I have mixed feelings about these jeep safaris.
We booked one, and didn't know about the water aspect. We were told the kids could use water pistols, but thought apart from this, it was just a bit of off roading, some dusty roads, and being able to explore some out of the way areas. WRONG.
First off, they announced that they no longer could use water pistols, as the police were cracking down, but we were welcome to improvise with water bottles, as long as we didn't on the roads in view of the police, otherwise they would be fined.
Great! One jeep was occupied with some "chavs" who seemed to have discovered
Marmaris 
At every opportunity, they were not only throwing water bottles, but as the jeeps jostled for position (The drivers finding this great fun to overtake and cut up each other), as they overtook, they were emptying those 5 litre bottles over everyone.
These huge bottles they would fill at every stop - including river water and dirty pond water. At one stop, one chav got hold of a hosepipe and decided to turn it on our jeep where we had just got in after lunch, the girls were applying suncream, had handbags out, were adjusting cameras. I went mad at him, and the driver had to keep me calmed down from jumping out and frankly flattening this chav. The rest of the chavs and chavettes started a "boring" chant - boring for objecting to this mindless idiot turning hoses on people.
Later the jeep driver pretended to break down in the middle of a dirty river, an excuse for all the other drivers to drive at speed and drench us in pondweed laden water.
The family in the jeep with us we met the day after, and they'd had to take their youngest to the doctors for an expensive treatment for a problem caused by this dirty water.
The drivers/organisers, at one point they grabbed this young girl, and threw her in the dirty river, despite her pleading to be put down and left alone. She was bruised and had some clothes damaged, very upset these people just ignore the requests of their customers.
Oh, and as everyone would probably testify, these jeep safaris have an arrangement to drop their captive audience at extortionately priced cafes. Thankfully none of our party were ill from the cold to lukewarm chicken provided - though we mostly left it so that probably helped.
I'm not just moaning - a lot of it was fun, and I'm glad I took part - but....and it's a big but......these safaris, well do be certain you know what you're getting yourself into - as soon as you are just about dry - you will be once again very drenched one way or another, and one driver admitted to me that it's not unusual for patrons to get annoyed by the selfish antics of other patrons, and for it to end up in a fist fight.