Another way to do it

How can you carry your propane tank(s)? How can you carry them so they don't take up valuable interior space? How can you carry them so you don't need to worry much about them being hit in an accident? How can you carry them so you don't need to worry much about propane leaks? (Water leaks might be different matter.) Here's one person's answer.

And if you want to share your favorite quotations with the world, a white van makes a nice large marker board.