I am also building my base of knowledge on water disinfecting methods.

My standard practice is to filter the water. If I am unable to filter, I boil it (3+ minutes due to high elevation).

I am trying to come up with option #3.

I purchased "Tincture of Iodine" yesterday. I had to talk to the pharmacist to locate it "behind the counter". (Sounds like it is used to make meth).

Cody Lundin recommended 5 drops per quart.
I always try to get second/third confirmations to information I read. I found good confirmation here:
http://www.cdc.gov/travel/water_treatment.htm
(NOTE: say's safer and might not kill)

As far as effectiveness vs risk studies, any good references for idodine, Chlorine Dioxide, or other recommended chemicals?