Here is a quick and relatively cheap way to get some running water in the field.
I bought this 3 gallon sprayer from Amazon.https://www.amazon.com/gp/aw/d/B002YNSAGW?psc=1&ref=ppx_pop_mob_b_asin_title
Then I bought this kitchen sprayer as well from Amazon. https://www.amazon.com/gp/aw/d/B07HSWKL6G?psc=1&ref=ppx_pop_mob_b_asin_title
The kitchen sprayer comes with attachments and a hose clamp, cut the hose on the sprayer at the wond and use the correct attachment to attach the two hoses. You will have 7ft of hose.
It works great for cleaning dove or game in the field, cleaning your hands off, giving the dog a shot of water, add ice to the container for cold water to cool a dog off, you can use it to take a shower while camping, lots of uses for it while out in the field. It has decent pressure and 3 gallons last longer than you'd think.
All in all about $70 and 5 minutes to put it together.