Complex sentence: For its national competition, the band had planned to travel to New York to participate in the Bands of America Regional there, but due to weather concerns changed plans at the last minute, instead traveling to Atlanta, Georgia for the Bands of America Super Regional.
Split into simpler sentences: For its national competition, the band had planned to travel to New York to participate in the Bands of America Regional. However, due to weather concerns plans were changed at the last minute, and instead traveling to Atlanta, Georgia for the Bands of America Super Regional.