So I had this idea the other day but forgot to post it after the Australia map was announced so...
Conservation mode would coinside with the main game just like a Lodge however it's an empty map void of any wildlife. For simplicity say half the size or more of a normal map and maybe it would have an onsite Lodge which would work as your main base.
In this mode you would chose your reserve as normal and go hunting but instead of going for a kill you would tranquilize your target, track it and have it airlifted out of the map.
Cut to your private conservation reserve, select your animals you want brought into your reserve. Set up need zones and admire your work.
The best trophy is a living trophy...