I was banded about 5 weeks ago, i got banded in my home town but i go to uni at the other end of the country, because i moved away about 2 weeks after surgery iv had to go home for fills because there arent any doctors that do WLS in the city where i go to uni, its totally manageable, im going overseas at the end of the year so about 12 months postop and the Dr said that at that point you should be fine and not needing any fills and if there is an emergency and you need an emergency unfil any doctor can do it as theres lots of instructional videos available, If your worried before you go they can take some fluid out so its not tight it might push you from the green zone to the yellow zone though which is fine for life just not for weight loss.
Good luck for surgery