I am planning to travel internationally in the coming months. I had signed up for a quite a few rewards/mileage programs previously. I was wondering - should I take all the rewards/mileage program information with me? Should I take only those that I would need at the destination?
The reason why I am asking this is, for instance, if my flight with Airline A gets canceled and I get a booking with Airline B, I would need the frequent flyer information for Airline B. I know that most (if not all?) airlines nowadays allow the traveler a few weeks after taking the flight to get points for the said flight. Is it the same with hotels as well?
What is your 'strategy' for taking travel rewards/frequent flyer information with you?