Stansport 5 Gallon Dispensing Water Carrier

To fill tanks with a spigot like that I use a collapsible 5 gallon water bag. I fill the bag then set it on a picnic table next to my camper and with a short length of garden hose fill my tank. Edit to add: Something like this. I may have used a length od clear poly tubing that fit over the spout. https://www.walmart.com/ip/Stansport-295-Collapsible-Water-Carrier-5-Gallon/21020691?wmlspartner=wlpa&selectedSellerId=0&veh=seo_fpl&cn=google