OH - and I have a customer out in Ojai who has a bad well. They put a waterbed mattress in the back of their pickup truck and drive two mile down the road to a friend who is on
'city' water. The mattress was a freebe, and the friend doesn't charge for 150 gallons of water every three months, so it's a great deal. I'm not sure, but I think they may actually bring the mattress full of old spa water which they dump out on some fruit trees before filling up with fresh water to go home with.
The 150 gallons is less than half of their 400 gallon tub, but it makes all the difference in the world.
A waterbed mattress, fold-up water tank, three plastic 50-gallon drums, or an actual water tank would work.
Here is an actual 'foldup water tank' that works well: