anxiety and ativan ?

Good morning everyone :)
i would really like to know it ativan is capable of blocking the panic attack and anxiety symptoms.
I experienced my first panic attack like 6 years ago, when my mother passed away, i was treated with remeron and deanxit, this worked a lot for me, i never had any panic attacks since and i stopped my treatment like 2 years ago. and never had a panic attacks the past years. I have an active social life But the thing is that i fear going on long trips and vacations, so i've been avoiding them, coz i feel more secure in my safety zone , wich is like 1 hour from home.
Now the thing is that i'm traveling for the first time, for four days, and i'm anxious about it. so i was planing of taking ativan before getting on the plane and for 4 days only. i dunno if this will work properly for me.. and how much should i take 1, 2 mg??? and how frequently??
thank you verry much for ur help :)))