Can just anyone sell merchandise at the king of the hammers without getting a vendor booth. I have never been and would like to go this year. I just have some key chains and business card holders more styles to come. Any advice is appreciated.

pm 'Jeff Knoll' or Dave Cole ('JeepRecoveryTeam').
They can help promote your booth if you coordinate with their event.

You can't just "Set up a table" and sell stuff without having a proper vendor space. Contact Jeff Knoll or Dave Cole to secure a spot, you should do well. Although if you don't have a licensing agreement with Jeep, you may find yourself in a pickle selling any product with the 7 vertical grill bars, they are VERY protective of their trademark.

Vendor booth info for KOH contact cbolger71@gmail.com

Its a little more involved than just showing up. BLM requires a permit for any retail activity in Johnson Valley.