Why no Dorkle?
Well I have wheeled at Harlan during big rain. River behind campground rose about 3 feet. Every trail looked like a creek, but never had to cross water deep enough that warranted one,
I have wheel Mnt City when water was deep at every creek crossing and the water fall was gushing. No need for one there either.
Long story short. I have wheeled all over, and no where that is open to ride had water deep enough to need one.
We did have flash flooding once here in Burke County where I was out sight seeing the damage, and I went across Antioch road near Hwy 18. You could see parts of 6 cars/trucks sticking out of the water. Water got up to my seat inside my Jeep, but no issues. (note: not a smart move at the time)
I have just never saw a need for one, ever, anywhere I have wheeled.