That said, we were able to improve on her third piece of advice, which was to fly into Barcelona, then take a train to Narbonne. As much as we would have relished a visit to Catalonia, our tally of round-trip train tickets for seven people came to roughly $1,000. Instead, we booked flights into Toulouse, landing midafternoon, and rented a one-day diesel van from Europcar. (We found that a one-way car rental across national borders was complicated and costly.) The van easily carried all of us and our bags to Narbonne for our first night, and then on to the boat the next day, all for less than $300. My state-issued driver’s license and a credit card were all I needed to rent the car, and the driving time was less than two hours. The return train connection from Castelnaudary to Toulouse was an easy 40 minutes and cost us less than $15 per person.