If you are currently still stuck w/out power and really just need to get gas out of the van you could disconnect the line someplace, connect a tube between it & the gas can & apply 12V to the fuel pump.
The downside to that idea is that if you aren’t all that experienced in messing with cars you’ll probably do more harm than good, including creating danger. You’d probably need a special disconnect tool for the fuel line. Then there’s the energizing of the pump. So if that all sounds like a lot for you to figure out don’t try it.