The best base is one built on a small island away from shore so you can't be attacked at all. My main base is on an island large enough for a few good sized building and some farming, and above storm surges. It can only be approached by boat. With no-spawn items spread out I now get raid warnings but nothing ever shows up as it doesn't have anywhere to spawn in. I have other bases but having a save fallback if everything goes massively wrong is nice. It also means if I want to chill, build, farm, and fish, I can do so with no worries