Ideas for Carrying and xfer of water to fresh tank

I pull two two of these filled 7 gallon blue water jugs:


in my little red wagon.

Wagon is useful for firewood and Granddaughter also.

And I use my water pump in my trailer to pump into the freshwater tank. I used some valves and tubing from water heater bypass kits to allow pump to do both chores (pump water into trailer for use and with some valves changed - pump water into the fresh water tank from the blue water containers.

Ed