Enter building script for a open world game

On trigger enter the game will load the scene, but the problem is that it will reset everything and i tried "dontdestroyonload" but then everything will respawn again, and also it wont spawn you outside the building, i want it so that i can choose where the player spawns when he returns back outside.

for people that want to know here is my script (Javascript)

 #pragma strict
 
 var leveltoload : String;
 
 function OnTriggerEnter (collider : Collider) {
     if (collider.gameObject.tag == "Player"){
         Application.LoadLevel(leveltoload);
     }
 }