Clearblue
I have a Rokon Trailbreaker with the Kohler engine. It will climb ANYTHING! Go through mud, over logs, up steep hills, anywhere you can walk it will go plus it floats! I use mine in the woods where a four wheeler can't go. It weighs about 200 pounds (not 600 pounds like a 4wheeler) and is easy to lift or spin around on its kick stand (it has no reverse gear).
They are used in South America, out West for hunting, by the Forest Service and even by the Jordanian Special Forces. A Rokon is just about bullet proof. There are no fancy electronics to fail.
It will haul 1,000 pounds and pull 3,000 pounds. The downside to a Rokon is that the rack space is small, it will only run about 25 mph on top end, and the ride is rather bumby since it does not have shocks. On the other hand, they are a lot of fun! They have been around for about 40 years and have changed little except for the 4 stroke motor. It will probably out live me by long shot.
Hope this helps some.
Semp