Here in Iceland (a wet and very cold climate) I have usually problems with slugs if I keep too much mulching, but ground covers might be fine depending on the species used for the cover.
I had one bed covered with strawberries, and I had no problem with slugs there. But other beds that had plenty of mulching, had serious slug damage. I find it ideal to lay the organic matter mulch in early summer: this does not create a slug problem as early summer is dry. Then, late summer is wet and cold, so that's when I
should not add mulching.
Just see what works for you, depending in climate and season.
Our projects:
in Portugal, sheltered terraces facing eastwards, high water table, uphill original forest of pines, oaks and chestnuts. 2000m2
in Iceland: converted flat lawn, compacted poor soil, cold, windy, humid climate, cold, short summer. 50m2