I would also argue those water clarification tablets. I used them once while on a long hike and boy did they give me the shits. It looked so much like curry it could've fooled an Indian. Not to mention it makes the water taste like shit. I would recommend some lifestraws or something like this and a few of its filters.

Hand held portable water filter for hiking/camping. I've had a Katadyn brand for years and its always worked and held up wonderfully. They dont seem to have changed the design at all so filters are still available to purchase last I checked. It has a double pumper so it works on the push and pull of the handle and gets a good flow going. No batteries required and the filters last a long time.

https://www.amazon.com/gp/aw/d/B000KUVVY4/ref=mp_s_a_1_4?ie=UTF8&qid=1507476729&sr=8-4&pi=AC_SX236_SY340_FMwebp_QL65&keywords=Katadyn&dpPl=1&dpID=41P045093FL&ref=plSrch

There are more compact versions, but they are more fragile, more work, and less user friendly. I have a life straw too, but that is only usefull when you are at the physical dirty water supply and cannot bottle with it unlike the manual water pump filters.

Edit: also people seem to like these stoves, and they are cheap. https://www.amazon.com/dp/B00079YTS8/_encoding=UTF8?coliid=I1FJ6H2SP28IYH&colid=2WSF630AX5JIE