Yeah, my high school has almost 300 members. We are expecting over 300 next marching season. I think 7 basses are a good number for a band that big. Our writer of drumline show music is John Cypert. he is a realy good writer and writes for some colleges like UGA. I will try to get you guys an example of our show music (bass) and see if you like it or it is too much. All the players on bass are pretty good.
Edit: here is a link to our opener for basses in our show.
don't copy and give to your friends and stuff,
Baccan