It will not reset no matter what, yeah that's kinda bummer but if it can reset then the game are no longer fun I think because we can mark several caves then keep coming back to it when we needed it makes us not explore the map also it makes more realism since materials are finite.
How many friends are gonna be joining your server? I've played with 3 friends and all got what they need I mean the materials are more than enough for them to use. But it requires us to explore more area to mine the materials including sailing to the neighbors' islands