Welcome to Healing Well and to the Anxiety -Panic disorder.
I am so sorry you had to cancel your vacation plans.
Cognitive Behavioral Therapy (CBT) is a therapy based on modifying everyday thoughts and behaviors, with the aim of positively influencing emotions. This is a very popular therapy and many members have had great suggest with it.
I am not sure which therapy your physician is talking about but there are many good therapies available. It is worth giving it a genuine chance at helping you with your issues.
the simple answer is a course of any valium type meds taken before and during the vacation, in an adequate dose, plus some different ways of calming and relaxing yourself
get some self help books on agoraohobia and panic disorder and follow their advice if you can