That is the system I’ve used. Simple, easy to maintain, fill and simple to replace/repair. After a couple boats, decided that I did not want a permanent tank worrying about “funky water”, just replace the jerry can if necessary.That's exactly what I was talking about. Here's a pump I've seen people use:
http://[URL]https://www.amazon.com/Portable-Submersible-Campervan-Travelling-Gardening/dp/B01M3XOXQ0/[/URL]
And a faucet:
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Just submerge the pump in a jerrycan and you have a water system.