Here on the wet coast, wireworms (click beetle larvae) are a fact of life. A few holes in your potato are reasonable to deal with, but last year there was an infestation of the things and my potatoes were ugly like a teenager with bad acne. To get rid of damage this bad and produce an edible potato, one has to essentially peel it twice or thrice.
The infestation may have been my fault for ignoring the possibility or it may be a consequence of hot summers. Consequently, controlling the wireworm population is a priority this year (and in the future). The bad news is that this is difficult, partly because the critters move up & down in the soil depending on temperature & moisture and partly because they can spend many years as larvae before turning into the adult beetle.
Leave them no food (bare soil through the winter), tilling the soil 6" deep a couple times prior to planting, using traps (potato slices skewered with a stick & buried), a final tilling of 2" before planting, and applying the proper beneficial nematode species are the steps.
I've taken two passes at the tilling immediately prior to frosty nights, so have some hope that they either froze to death or the birds feasted on them in the morning. Today I've added traps to the garden and will check them in 3 days.
The traps:
The traps in position:
