Not a freighter, although that would be interesting I'm sure! I'm taking the Norwegian Epic cruise ship. It's a repositioning cruise so they have some fantastic rates, as low as $399 per person.
We did two crossings, the NCL Epic and the Star, and had a ball. Epic went to Barcelona and Star went to Copenhagen. We had a room with a porthole. We usually opt for a balcony, even though they cost more, but on the springtime crossing, the weather is still cool and it is very windy because the ship has to keep up it's speed.
We sat with a different group of people each evening, most of them were from Australia, and we made lots of new and interesting friends. On a number of occasions we missed the evening shows because we were having so much fun with the dinner company. Often, we closed the restaurant and the staff had to chase us out.
The Epic had great shows, such as Blue Man Group and Cirque du Soleil, which charged an additional fee. Even though we had seen the Cirque on land, the sea-based show was the best show I've ever seen anywhere, and not just Cirque, but any show! They were out of this world.
It was a great way to get to Europe, avoid a drastic time change, and get to see a little of Barcelona before heading out on the Camino. I
highly recommend it, if you have the time and it is cheaper than flying. If I recall, I think Jane discussed this in her book, Women of the Way.
Let us know how it works out for you Firefly57.