M.W.
All three of mine have had tubes. My sons have gotten clogged before, but for him, once they got them cleaned out we never had anymore problems. His clogged once when he had severe congestion and the other time after having his tonsils removed. They did the same treatment~drops and then a followup. I know one time they had to go in on my sons ear and clean it out with this scary looking tool, but it did the trick. I think you'll be fine for the trip. Have fun!