Hi homesick,
I think you would find that most fire services would not have a clue when it comes to rescue of aircraft with caps ( definitely the case with my local services)
There is a first responder instruction list from the caps website, from memory you have to physically cut the actuation cable at the baggage door
with special cutters if possible.
I read Recently in the US a cirrus pilot pulled his caps handle only for the rocket to fire but did not pull the chute out, he still managed to land but with a 30 ft cord and spent rocket casing dangling behind. Inadvertent flight into IMC I think it was