That, I think, what you are after is called respawning. Make a file in notepad call it description.ext and in there type this:
respawn="group";
onLoadMission=Malden
Just change the name of your island depending on which one it is. Place this file into your mission folder and that way as long as your players are grouped together you will respawn into one of them when you die. There are a bunch of posts about this just search for respawn to find the different ways you can do it.