I'm having difficulty visualising an island with makeshift buildings.
Anyway, I had no idea what Yantar or Lemansk were, so I did a search and came across
this. It confused the hell out of me until I realised it was an online Role Playing Game and he's in character.
If you're still in a STALKER mood, you could have a look at
Chernobyl Mod 1.0. I tried it a while back and considered it somewhat unfinished. I'm not sure if it'd be possible to separate the island from the Mod. DXDLL is included and you can change the settings if you don't like how it looks.