Yeah! I wanted to register for Dragon*Con, but it's so large and gets so many entries, I didn't get a table in time. Maybe next year~. I'm currently registered for a local convention in May, so we'll see how that goes!
Your tarot cards are a great idea for merch. Will they be stickers, prints, both? I found it somewhat difficult to make non-comic-specific prints geared for a general audience, but I think it's just that I've never really tried before... Anyway, you've got a great style and theme going for you!
The best part was meeting people, definitely. I've never talked to so many artists/writers who had the same interests, and it was a fantastic experience to share our stories and passions. So amazing~