Ideas for Carrying and xfer of water to fresh tank

We use a 55 gal plastic drum when we dry camp at the NASCAR races. The drum has two openings. One is fitted with a spigot and a pipe that goes inside down just off the bottom. The other is fitted with a air quick connect fitting. We attach an air compressor (very low pressure) and we have water flowing out the spigot. Attach a hose and fill up the fresh water tank. It works like a giant pump sprayer.