I like the small Sawyers because I can even hook them into my Camelbaks if I have to grab dirty water on the run for whatever the reason.You read my mind. I have 2 Sawyer filters in my BOB and camp gear. Was trying to research how to plumb it all with quick disconnects, and the ability to backwash the system using the barrel pressure. Being able to flip it around would be cool to do that.
I also have a kaytdyn vario I can screw nalgene bottles onto the bottom and fill as its filtered. Or I have a hose i can run into any container (even the disinfected camelbak) if time isnt an issue.
Sometimes due to security or other time issues you may have to pack out dirty water and filter some as you keep moving and filter other containers once you get to safety. But you'll still need water as you move. Those small in line sawyer filters are great for that.
However they do not filter chemicals or heavy metals or certain bacteria even. So it's good to use iodine tabs too. At least you'll get anything that will give you the ****s or pukes