Aside from some of the more distant settlements like Aoteoroa (New Zealand), Rapa Nui (Easter Island) and Hawai'i (itself of course an archipelago) which had rare to non-existent with other Polynesians, contact between Polynesians was common. Samoa, Tonga and Tuvalu were all in constant contact with each other. This doesn't include contact with non-Polynesians. The above mentioned places were also in close contasct with Fiji and a group of Fijians, Samoans and Tongans are known to have invaded Kiribati at least once, and the language has several Polynesian loans that reflect this. Polynesians and Micronesians had the best sailing technology and navigational skills in the world until the Renaissance. They were accustomed to making journeys of several 100km semi-frequently, as a general rule, though there are exceptions like much of the Marquesas, which are mainly high islands lacking fringing reefs, which make them a lot harder to land and depart from, making frequent travel more difficult.