Many replies coming - hopefully.
Kind of depends on your area and how much water and what source it comes from and the time of year.
Will it be winter, freezing temps that could impede a filter on a filtering system
Is it a wallow or urine, fetus filled small puddle.
Is it a nice stream, creek or river or pond.
I hunt with small streams as a source.
I have a bladder for camp (10 liter) with filter system built inside. Just dump water in it and it is filtered out and ready to drink from the fitting on the end. I use this mostly for dehydrated meals, coffee or washing face and teeth.
- I utilize this more if my camp is very close to a water source and just fill this big MSR bag and carry back to camp and hang it.
- If I am not by a good water source for my camp then, I carry a small dirty bladder to fill and then transport water into this 10 L camp bladder
I also carry a 2 liter bladder in my pack that I pump in filtered water using my MSR pump and quick connect fittings.
- I can drink from this as my hand pumped already filtered the water thru it, or use to top off my big 10 liter camp bag up each day (2 L at a time)
I also have a Nalgene 32 oz bottle, that I scoop water into, and sterilize it with a "Steripen Classic" or equivalent.
- This is my favorite as it is quick and light and simple.
- I always have the Nalgene bottle, Steripen on me, even in day pack mode.
I have aquamira tablets In my emergency kit to use in any size 2l or bigger bladders with unfiltered water- if my other systems don't work or break or freeze or what ever I have this as a back up.