Yep. + whatever on the pizza stone. Buffers and equalizes the heat. The heat is too concentrated in a small oven without that stone.
Prove it to yourself by getting an unglazed clay tile from any home center. They do the job too, but we broke a couple from the bouncing while towing. For a long time I continued to use the last broken one, and just arranged the pieces each time we setup. Finally spent a couple sawbucks on an actual round pizza stone and it seems to be indestructible.
Get a little hanging analog temperature gauge to hang on the rack, to confirm your actual temps. Then practice, which is the most rewarding part of this.