Sometimes it's hard to discourage your "tail". I have a new tactic: make a dumb call. Hey, I'm gonna' hit shirley bowl, want to come. nah, we'll catch you later. yeah, see ya'. Let them dissipate and head for sibo instead.
Here's a technical point of following. follow too far back and you may miss subtle leads that are essential to make the line. If you're unsure, you hang back too far, and can go wrong.
Cyclists have this lead thing really carefully worked out, due to the leader being the eyes for the whole group. It is established that when leading you will ride with an extra measure of caution. You MUST make it through, and with a margin for safety.