Ours used the fishing wire to place 2 bolts, however I do not remember once in place what was involved as far as tightening and getting wrench on it (so what would take to get back off). Worst case is cut/grind off.
Curious, actually I just looked, Id try to unbolt but at least 1 and assume the other also is a carriage bolt (probably why I don't remember getting a wrench on it), likely it or frame would yield/spin so cut off wheel (or nut splitter) would be handy and probably easiest from the get-go.
However given age and limited range of trucks they would fit I doubt worth the effort. The fronts I think on yours may fit up to an '09 but part number would help to sell for fit. But for 5 year range I wouldn't bother. Might be a plus when if selling truck.
The Fastguns easily re-sell.
Another suggestion is re-purposing the front mounts and arms. I welded plates on top of insert arms and use as bed access steps when camper not loaded. I reworked some old arms but could be done and still use as camper mounts.
I use mine alot for getting in or just standing to reach bed floor.
