I'd recommend a Milbank filter bag with a SteriPEN w/solar charger plus tablets as a emergency backup. You can use the Milbank to prefilter water before boiling or using the SteriPEN. A home-made Milbank can be sized to carry and protect one gallon ziplock freezer bag(s) or a small solar shower to transport water away from the source (and swarms of mosquitoes) for purification. It will also act as a half-assed evaporation cooler while wet.