I boil to purify water, but carry Micropur tablets as an alternative. If fires are safe and allowed, boiling is simple, effective, and free.

For a sleeping bag, I would go with something with Climashield insulation. I wouldn't use down for a warm weather bag in moist climates. I use a Climashield quilt I made from a kit, but am still undecided on whether to go back to a bag.

For food, I just buy packable stuff at the supermarket: peanut butter, Power Bars, granola, rice, instant oatmeal.