After reading the wonderful comment that Cantina Anderson wrote about my previous article I went and checked out the website that she referred to. Wow! What an awesome sight. You can find everything relating to colorguard from equipment use and maintenance, to performance tips and costuming. I would highly encourage you to give it a glance. It is called Color Guard Educator and Catina Anderson is the editor but it includes articles and discussion by many other knowledgeable individuals.
Relating To Your Colorguard: yes, they’re people too.
I feel very qualified to write about this topic because I have been on both sides. In high school I marched piccolo for 3 years and then was drum major my senior year. And in college I marched piccolo for 1 year, then joined the flagline for the next three, the last of which I was captain. 
Your colorguard is part of the band as much as the trumpet section is a part of the band and understanding them and where they are coming from is very important. Here are six main points that I suggest to improve the relationship.
Music and Education 
