Not sure if you still need it but:
For the camera, with the triggerzone's name in the ifused field;
;Artificial Intelligence Script
;Header
desc = Fade Out Disappear and Activate IFUSED
;Triggers
:state=0:state=1,activateifused=1
:state=1,alphafadeequal=100:decalphafade=0
:state=1,alphafadeequal=0:state=2,destroy
;End of Script
For the triggerzone;
;Artificial Intelligence Script
;Header
desc = Plr In Zone kill If Unactive
;Triggers
:state=0,plrwithinzone=1,activated=0:plraddhealth=-1000
:state=0,activated=1:state=10
;end
Forgot to add in sounds, but that should be easy enough.