Given the expense ($50) and the peace of mind that it will give you, I would say do it. I can't image being on a honeymoon with my new wife and having to worry if the whole trip is going to be ruined by a stupid $50 pump. He's my advice:
Visit NAPA and get the pump and belt.
Visit Ford and get the tensioner.
Spend 2 hours on it on Sunday morning
Enjoy a worry-free trip with your new wife.
The process took me about an hour to do, if you are inexperienced at these sorts of things, I would allow yourself 2 hours.
Good Luck!
