Ahead of going bush next Monday for 10 days, I've built a 3 jerry can rack, that fits neatly between the front of the trailer and the storage box on the A frame. It's made from light gauge angle and flat bar and is bolted to brackets on the A frame. I've added a chain that loops through the handles and locks onto a lug at the other end.
I also added a marine ply base, with holes for the bolts, so the jerry cans won't rub their bums on the heads of the mounting bolts.
The other thing I've built is a 2 legged support that fits under the edge of the swing out kitchen, to give a little bit of support. I've over-engineered it, but that's how I make most things!!
regards
Rusty...