Advice sought for selling books and online course at homeschool conventions

Hello!

I volunteered at a mobile bookstore at a large homeschool convention (Teach Them Diligently) a while back and loved it. I would love to be an exhibitor at more in the future but don’t know a whole lot about the homeschool convention world (I do know that homeschool teens and homeschooling moms like my books, though). What conferences do you recommend? Any other tips? I know the booths can cost $600+ and you have to pay for housing.

For reference, I have 10+ fantasy/fairytale/steampunk novels and anthologies to sell, plus a nonfiction on how to self-publish, and now an online course on how to write fiction (with a mentoring option to go with that). I also just find selling books in person a lot of fun.

Thanks!