You're probably not going to find any catered specifically towards comic strips vs. comic books. That's like splitting hairs! No matter what kind of comic you do, you're a comic artist, and will fit right in with everyone else. If anything, you should shift your focus to trying to find indie-friendly events and areas. Some conventions have a large crowd looking for original content and others don't, so sometimes it's just trial and error if you can't find reviews about it online.