Tough call on the question of whether or not to be out. How awkward, though, if people pick up on stuff and think you're being cheated on, and have to figure out whether or not to tell you their suspicions.
A great piece of advice I'll paraphrase from Dan Savage -- people often just don't know how to react. If you break the news in a tone of voice like you're saying "I have cancer" they will take it poorly. If you talk about it like it's an exciting, fun secret, you may get a very different reaction.
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.