I wasn't sure what to say over at fandomsecrets but if you want to go, you definitely should. Don't listen to those who have something stupid or snarky to say; your sexuality is your own and you don't have to prove it or justify it to anyone. Whether you tell them or not is your decision and either way is fine. I guess you might run into some awkward situations with people who have issues with bisexuality, but those people are dumb and frankly not worth your time anyway.