The first order of business after they set sail, other than the messages to the Wave Rider Council that had already been sent was to head back to Assah and have a talk with the Dragon Riders. The information that they had now about the intentions of the Frost Giant led forces of the Western Continent would be of great interest to them and any other merchant sailor that visited the region.
The Giants hadn't said that they would stop the attacks, in fact, they said the opposite, that they were staging additional attacks on the Gnomes. They had only said that they would avoid the Central Continent and the area controlled by the Dragons.