Let’s zoom in on Arbakka a bit, it’s looking a bit promising for a home base.
Three things that makes it fun for the PCs to have a base in Arbakka:
1) An open spot on the town council is available, and supporters for each of the major influences (esp. Hava’s Orchard, Sveidi, and Murad) are vying for it. An influential PC could determine the spot, or claim it for themself.
2) The town was founded around supporting a wizard’s tower where he experimented on various aspects of exploring the lake and river. He has long since passed, but many of his experiments live on. The tower is easily seen from all parts of town. The enchanted waters make it particularly easy to catch fish, giving rise to a thriving fishing trade. The druids? Not so fond of this.
3) Kuo-Toa in the river worshipped the wizard as a god, and they believe he will come back to them one day. He convinced them to defend the town from nearby goblinoids. It makes the town uneasy, and they don’t always treat them well.