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It partly would depend on your method/recipe, equilibrium cure? brine? saltbox?
If you followed a good recipe,ie. added the right amount of cure, letting it sit in the cure for a few extra days shouldn't be a problem. You may have to do a fry test before smoking, and soak it in fresh water if it gets to salty.
In an effort to speed the process, some recipes result in under cured bacon which then results in having to soak, fry testing and then complaints of salty bacon.
The following should help explain how when properly cured, bacon tastes less salty, and the subsequent soaking and fry testing is not required. You can then make up your own mind as to how you want to cure bacon.