https://www.amazon.com/WINTOOLS-5-28...908963&sr=8-17
These are easy to store amd mount.
https://www.amazon.com/Scepter-08669...0909068&sr=8-9
Two of these easily mount under yout rv.
https://www.amazon.com/DIFU-DENESTUS...0909283&sr=8-3
I have all three on offroad vehicles.(painted black so they don't show you well)
Jerry cans are too cumbersome and do not store well. They're too tall for most rv bins.
And
Buy the harbor freight battery powered transfer pump and back it up by having a jiggle in reserve.