Haven't read the whole thread... But those blue cubes fit PERFECTLY in square milk crates. Protects them and makes a great stand. I recently got a water port brand pressurized container for free but it just doesn't seem worth it to bring and deal with.
Visit your local car wash and ask for a 30 gallon plastic drum. They typically hold detergent for the car wash. Couple of rinsing and they are good to go.
PS: They also make great gas containers. People in the Alaska bush use them as gas tanks on their boats.