Subwoofer Lullaby for trombone quartet

Hi! I wanted to arrange this so that I and the other trombones in my group could play it, but it does have some very high notes. I released a lower octave one so you may be able to play it, but it needs a bass trombone. Also, there are a few divides (where there are the 2 C's near the end) that can be played with a bass trombone and sound better that way, but it's not required.