A reminder that the seemingly innocuous dayhike requires a prudent, minimum-level kit just like longer outings. This page on Bruce's Boreal Wilderness Institute site speaks to this:

"Decide what critical survival items you need and always carry them, not a small placebo kit filled with trinkets and toys. What you take into the wilderness is critical to your survival, although your most precious possession is the mitigative learning and experience in your brain."

Further emphasized here 15 Critical Items for Wilderness Survival : "Always carry the first eight items, even on short day trips."