Will acute angle closure glaucoma stop me from going on my vacation?

Yes. Acute angle closure is very painful and would likely put you in the er. Pain, redness, decreased vision, nausea, sometimes vomiting, etc. It's important to see an ophthalmologist to break the attack asap. A preventative laser can be done for those at high risk of acute angle closure.
Absolutely. If you are having an attack - pain, redness, lowered vision, steamy cornea, fixed pupil - you need immediate treatment to prevent permanent loss. The vacation can wait; get to an eye doctor immediately.