Never too old to learn something simple! I like some of your ideas here. :)
I have run out when boondocking too. I usually plan my trips when I know I'll be without services and bring a couple big honkin plastic jugs with me. I have two that hold about 5 gallons.
I rigged a plastic hose into one of the filler caps and carry a 3 foot wood stepladder. I grunt the jug up on the stepladder and tip it over to position the little hose in the filler neck. Works quite well.
But there has been other times I have had to go dunk a one gallon jug in a nearby lake and make countless trip back and forth. Then I use a cotton rag or whatever I can find to filter the junk out of it.
