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there's the seatpost mounted rack if you only need to carry light stuff (sleeping bag, etc.)
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i'd go with a bob trailer, no janky mounts and lots of versatility (fire wood! shelves! your dog! etc.)
I want to carry 2 decent sized panniers as I also need to carry a pack.
Where I'm going, a Bob trailer won't work.
These are the type of clamps I was hoping to find (but these are for mounting racks on forks that don't have mounts)
At my old job I had access to a machine shop so could have made them.