I keep my electronics in my puffy. Sort of loosely wrapped though the phone in a pocket. I put these on the shelf in the XLC or pocket if saddle bag type design.

headlamp lives with my glasses at the head end. I do not wrap this for battery life but probably should if I was on a long trip.

Water filter I do not manage. Perhaps I should. I would need to do more reading on that one. Though I feel marginal on the filter is Ok as long as you are not filtering dodgy water regularly. Though that is a topic that I am sure has lots of opinions.