The Ironborn kid said he followed Osha and Rickon to Skagos. And I'm pretty sure Arrec is trolling. You were dead on with your reasoning.
I gotcha, I guess they just changed courses then because they were originally going to White Harbor. I know nothing about Skagos so if that was a spoiler no worries.
Just got done with the Bran chapter where he used the trees for the first time. Fucking head is spinning now.
I definitely need to reread this book, and do some research at towerofhand... I meani get what's going on, just know I'm missing some stuff