I recognize the organized chaos
It's Walts RV in Fontana.
16616 Valley Blvd, Fontana, CA. Phone : 909-823-0563
Plan a whole day around it. You'll walk out of there with WAY more than you planned, and fiddle with whatzits and doohickies till the sun goes down without even realizing it.
It's a giant candy store for rv junk.