Two ideas:
(1) Take a 5 gallon bucket or a large collapsable bucket.
(2) Take coffee filters and rubber bands.

If the creek is close, pull the water and let it settle out in the bucket by waiting 10-15 minutes while doing other stuffbefore filtering it and don't filter the last 2 inches in the bottom, this will keep the big stuff away from your filter.Use the coffee filters and rubber bands around the end of your intake hose to keep out the big stuff that can plug your filter upfast. Since you are totally dependent on the stream take a spare filter or a second filter system. If you have to drink unfiltered water then find a running spring source and get as far "back in there" as you can.

Depending on the type you use, if it puts any chemical into the water to kill viruses then using the charcoal filter on the output end returns the water to a normal tasteand is very nice since your coffee won't be wierd.