1. The fisherman thing is weird/misleading, but it's in the cabin at the fork in the road that leads to both the Overgrown Temple and the Queen Bee's hive.
2. Complete Brasswall's storyline and then go to the igloo northwest of Brasswall. Characters there will smuggle you into the Dragon Isles to start that story arc.
3. You are correct. Both the quest journal and the "advice" function at waygates are very out of date.