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So, be careful when bathing, washing your hands/face, washing dishes, etc.

I have never understood this logic.  Obviously, washed dishes and washing exposes a minimal amount of water to be ingested.  Compare the exposure level from these activites to the exposure one has if one jumps in a lake for a swim.  Clearly the swim presents a larger danger.  So I can only understand be careful with washing activities only if one also avoids swimming.  If one feels swimming is safe, I do not understand how one could be concerned with those other activities.

I have a small gravity filter which is not of the capacity to handle a whole crew for a long trip.  We mostly drink un-filtered, but it is available for situations where center lake water is not easily obtained.