Being the resident water geek.

The problem with uv treatments (steripens and the like) are that it doesn't remove any tastes, mmm cow run off. If you double up with filters it's pretty good protection.

The sawyers are one of the best portable filters out there, and I have or have had most of the options.

If I were to go down there I would use a prefilter, chemical or UV treat then sawyer.