I've never really believed in testing my saltwater gear to find out "when it will rust"---rods, reels, knives, lures, etc. For me, that means at least a fresh water nozzel hose and quick rub down before sleeping & hitting it again in a few hours depending on the tides, weather and what's hitting. Not a speck of rust on my Randall#10-7" ---or my old Rapalla, early "70's Penns, old classic lures, etc. that will still slay "em on the right hour on the right day.
Keep it a little clean and don't worry. On the Outer Banks you may just be starting at 2 am.
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Duke;RKS#5567
RKCC-CM-087
Southwest VA