We have 3 ponds within our neighborhood, the closest about 1/4 mile away. If my stock of numerous gallons, water bob and water bricks was depleting I could walk or ride my bike to one of the ponds, carrying a bucket with lid or empty bottles in backpack.
if I had to hide my actions, I would use the backpack and go thru the wooded section as much as possible, wearing dark/camouflage.