The article has a number of good suggestions, including renting a car seat from a car rental company. If you won’t be renting a car at your destination, that might not be an option. If you need a stroller, a car rental company would not be able to rent you one of those. You could, as the article also suggests, buy a stroller or car seat and have it shipped to your destination, if you don’t mind the expense. Using Stroller Solution to rent a stroller or car seat at your destination is a great alternative to these suggestions. This would also avoid some of the issues that parents mention in the comments, like having your stroller or car seat arrive at baggage claim with damage from the flight.