What will recovery be like from a session during my vacation?

It depends on the Laser that was used. Most laser treatments cause some mild thermal damage to the skin. Think of it as a mild sun burn. After the treatment it might take up to two weeks for the skin to heal at the cellular level.
After the treatment you might have goose bumps red in color, mild swelling and some pain. It should not last longer than 2 days. After that your skin will feel normal. In about 10 to 14 days some of the hair will fall out of the treated area.
What should you do during the healing?

Avoid sun, use daily sunscreen
Apply a good moisturizer at least twice a day
Avoid any skin treatments, topical medications or waxing in that area

Regards

Usually with laser hair removal, follicular adenoma lasts a few hours. Follicular adenoma is the swelling around the hair follicle that happens when the laser follows the hair into it. 9/10 of our patients recover from follicular adenoma in a just few hours, however sometimes it can last up to 24 hours. You would be very safe to get laser hair removal on your vacation.