Array index help.

So I have been modifying the Unity 2D demo's "CameraFollow" script and I believe I am so close to getting want I need. My players are put in the array I have setup but I can't seem to step through the array by incrementing the index. I think I just need to somehow link the players(GameObjects) in the array to an int, but how do I do that? That way I can tell it to go to the next player in the array if the current player is not "activeInHierarchy". (Two of three of my players are not active in the scene, and I swap between them so I am trying to get the camera to follow the active player). If anyone can give me some advice or an answer to this I would be very grateful. Here is my modified script of the "CameraFollow":

 using UnityEngine;
 using System.Collections;
 
 public class CameraFollow : MonoBehaviour 
 {
     public float xMargin = 1f;        // Distance in the x axis the player can move before the camera follows.
     public float yMargin = 1f;        // Distance in the y axis the player can move before the camera follows.
     public float xSmooth = 8f;        // How smoothly the camera catches up with it's target movement in the x axis.
     public float ySmooth = 8f;        // How smoothly the camera catches up with it's target movement in the y axis.
     public Vector2 maxXAndY;        // The maximum x and y coordinates the camera can have.
     public Vector2 minXAndY;        // The minimum x and y coordinates the camera can have.
 
     public GameObject player;
     public int i = 0;
     public GameObject[] playerObject = new GameObject[3];        // Reference to the player's transform.
     public Transform players;
 
 
     void Awake ()
     {
         // Setting up the reference.
         playerObject = GameObject.FindGameObjectsWithTag("Player");
         for(i = 0; i < playerObject.Length; i++)
         {
             foreach(GameObject player in playerObject)
             {
 
                 players = player.transform;
             }
         }
     }
 
 
     bool CheckXMargin()
     {
         // Returns true if the distance between the camera and the player in the x axis is greater than the x margin.
         return Mathf.Abs(transform.position.x - players.position.x) > xMargin;
     }
 
 
     bool CheckYMargin()
     {
         // Returns true if the distance between the camera and the player in the y axis is greater than the y margin.
         return Mathf.Abs(transform.position.y - players.position.y) > yMargin;
     }
 
     void Update()
     {
         if(players.gameObject.activeInHierarchy == false)
         {
             //i++;
         }
     }
 
     void FixedUpdate ()
     {
         TrackPlayer();
     }
     
     
     void TrackPlayer ()
     {
         // By default the target x and y coordinates of the camera are it's current x and y coordinates.
         float targetX = transform.position.x;
         float targetY = transform.position.y;
 
         // If the player has moved beyond the x margin...
         if(CheckXMargin())
             // ... the target x coordinate should be a Lerp between the camera's current x position and the player's current x position.
             targetX = Mathf.Lerp(transform.position.x, players.position.x, xSmooth * Time.deltaTime);
 
         // If the player has moved beyond the y margin...
         if(CheckYMargin())
             // ... the target y coordinate should be a Lerp between the camera's current y position and the player's current y position.
             targetY = Mathf.Lerp(transform.position.y, players.position.y, ySmooth * Time.deltaTime);
 
         // The target x and y coordinates should not be larger than the maximum or smaller than the minimum.
         targetX = Mathf.Clamp(targetX, minXAndY.x, maxXAndY.x);
         targetY = Mathf.Clamp(targetY, minXAndY.y, maxXAndY.y);
 
         // Set the camera's position to the target position with the same z component.
         transform.position = new Vector3(targetX, targetY, transform.position.z);
     }
 }