It's just about proven that Polynesians were in South America due to the fact that their DNA is present in some tribes. Now on the idea of Polynesian Galapagos, I think it's feasible,especially if they get access to Andean crops.guinea pigs and llamas. And many Mesoamerican tribes domesticated iguanas, so there's another protein source. And they would make good traders up and down the coastlines, introducing llamas and guinea pigs to North American tribes as well as their pigs,chickens and bananas. Hell, the Andean agricultural package would help out in New Zealand! Ideally,I'd like to see them form strong relations with the Mayans,Mississippians, Andeans and definitely those of the Pacific Northwest. Polynesians in Galapagos also helps out the Rapa Nui. And if Vinland survived and formed another strong trade alliance, then they get goats and sheep centuries before Columbus, maybe even some steel weapons. Now,I'm contemplating a timeline where the Polynesians of Galapagos and Rapa Nui have a strong rivalry and trade agreement with Vinlander Norse.