So, technically this is a professional conference with a high registration price for librarians and our ilk only.
However, in the past few years, they have been offering an "Exhibits Only" pass which gives you access to the show floor, featuring many, many publishers, larger and small. The Midwinter ALA conference isn't as large as the Annual, but still a great place to pick up free books and meet authors, if you're into that sort of thing. At the Annual this past June, Image and Dark Horse were also represented.
Right now, an Exhibits Only pass is $70 until November 14. It's at the PA Convention Center in Philly, January 24-28, 2020.
I attended the Annual in DC this past June as a tabler in the Zine Pavilion, and brought home over 20 books! Some ARCs, some fully finished copies, some signed by the authors (including Jamie Hernandez!).
Just wanted to pass this info on in case anyone is interested. What can I say, I'm bookish.
Info at: 2020.alamidwinter.org