When I had my Metzler I took a 12V vacuam cleaner with me.
It was reversible so I used it for a pump.
I could deflate the Metzler enough to cram it in my little pickup and re-inflate it at the lake.
Nothing is quieter on the water than a Rubber inflatable.

If your way out in the salt water fishing for Salmon and the water gets rough, you are actually fishing out of a big life preserver.