If you look closely at the second photo you can see my hi-lift jack mounted to the cargo carrier. Please note that that second photo showing the rack folded up towards the back of the camper is just for show, if those cans had been full there is no way I could have lifted the rack, also they are too close to the back of the camper (approx 1/2" clearance). I would only carry full jerry cans with the rack in the horizontal (folded down) position. The brackets I used for the hi-lift are just standard brackets available at any 4x4 shop.... don't mount your hi-lift in that position, it gets really dirty. I have moved mine to a vertical position on the back of the camper. I made a shallow plywood box to fit between the jerry cans on the rack that works as a step and also a small storage area (box is roughly 24x28x6) sorry I don't have a photo of it. The sad thing about this cargo carrier/jerry can holder/storage box/hi-lift mount is that after spending considerable time and money on it I did not take it on my Australia trip, and havn't needed it since. It did not make the big trip due to weight issues, even without that whole assembly hanging off the back, my truck and camper were at 11,000lb fully loaded!!!!
So the moral of this story is don't get too carried away with adding gear to your truck and camper until you check the weight
Cheers
Mark