Cover all the basics as you mentioned you already do.
In addition to that, specify what YOUR rules are outside of the lines. For example, the county has a rule that if a student is failing two classes, they cannot attend any team functions (practice/games). The coach's rule is that if a player is failing ONE class, they're off until they bring it up. Since his rule is more restrictive than the county mandate, it's important to know.
Likewise about partying. Coach outlines the county policy, then makes it clear that if he sees a picture on a player on social media at a function with a red solo cup, he'll assume it's alcohol and the kid will be kicked off the team (not suspended, off the team for remainder of season).
So if your rules are lockstep with the school/county, let them know. If they're more restrictive, let them know.
Obviously, spell out your expectations for parents, i.e., coaching them during games, how they carry themselves, etc., and what to expect if they can't comply.