Yeah, I prefer the Aqua Mira drops. Basically, it provides a greater range of coverage than iodine. These are about 1/3 the concentration of the tablets. For most water in the ADK's you certainly do not need more, indeed, in many cases, you do not need any(nor will I elaborate, I do not recommend anyone going without some form of water treatment.) The potential damage associated with long term use (assumed from their statements) is also reduced. I, also, recommend alternating between types on a longer trip. The statement"The solution to pollution is dilution" remains true.
That said, do not scrimp on suspect water. Double dosing suspect water is probably a good idea, but, not on a "long" term basis. Filtering AND drops? Yes. This provides a MUCH higher chance of success.
Note that in the backwoods of the ADK's, it is rare to encounter fields or livestock. Bacteria, and viruses *may* be encountered because it is not unknown to have an animal dead in or near a stream. Guardia, in a warming environment, is perhaps, always assumed to be present. Crypto may or may not be. Mostly associated with mammal sheit. More common in the ADK's than many would like to admit due to beaver, otter, mink, weasel, 'coon, muskrat, etc.
Recently, I have been using a Steripen Adventurer. After three years of testing it off and on, last fall was the first I relied on it exclusively, only bringing three tablets for a weekend (along with boiling, minimum to sustain life.) It worked fine, again. I will continue along this vein this year for shorter trips.