What sandcruiser has said is pretty much my philosophy right now. It might change but we'll see.
I've driven with a fuel can on the back, 2 on the roof with 10 gallons of water on the roof with a roof top tent. Really I didn't notice the extra fluid on the roof over the tent. This is with the tall 6 inch lift I had as well. Now that I'm lower and a little stiffer I expect things to be even better.
The tent kills my aerodynamics as it is so I can't imagine the extra cans hurting things further.
I've driven with a fuel can on the back, 2 on the roof with 10 gallons of water on the roof with a roof top tent. Really I didn't notice the extra fluid on the roof over the tent. This is with the tall 6 inch lift I had as well. Now that I'm lower and a little stiffer I expect things to be even better.
The tent kills my aerodynamics as it is so I can't imagine the extra cans hurting things further.