My daypack weight is usually around 20 pounds. I have done Mount Olomana with my normal pack plus about six liters of water and 100' of climbing rope. That was a pretty heavy pack and a pretty good workout of a hike. It was overkill, but was done because some people are just not prepared and it was for safety.

I was going to go on a hike with a colleague of mine. We met at my place in the morning. He changed out of his work clothes and had a t-shirt, jeans and sneakers. I had my normal pack. I asked him where his pack was. He didn't bring one. I asked him about water. He didn't have any. I gave him a couple of water bottles.

We drove out to the trailhead. It started to rain. Hiking in the rain is slippery but fun. I canceled the hike. I just had a bad feeling about it. I probably would have gone if he had been a little more prepared (or at least had some semblance of preparedness).