When in the backcountry of the Rocky Mountains where finding mostly good sources of water, why do some prefer a filter vs just dropping iodine tablets along with the tablet that removes iodine flavor? I've always used tablets and never a filter. Tablets seem to be easier/lighter/smaller and less bulky to pack. Just wonder what pros and cons are? Used a filter one time a long time ago and it was a pain in the butt pumping the water and keeping hose from sucking in dirt and getting clogged up. What does everyone think and what do y'all use and have you ever got sick still using one or the other?