I would find a new spot go spot an stalk.if someone has blind on it means they were there first.they could have had a camera on the spot since march an have spent hrs driven an hiking to check cam change sd cards batteries. What would you do if it was your blind an you woke up early an went to your blind only to find someone else was in it.
we kinda need more info from you killdeer? Did you start planning on hunting the tank the sunday before the hunt starts an a blind was on it. or have you had a camera up since june an have checked it every weekend an then this weekend you found a blind on it?