Veijas Casino and Outlet Mall
Veijas Casino and Outlet mall is about 30 miles east of San Diego on Interstate 8, at about 2000 feet elevation, near the town of Alpine. They allow overnight stays in RVs in their eastern parking lot. (Check in at the security office.) The lot is not close to the Casino, but they have frequent shuttles.
When I was there they were offering a free meal at their Buffet for joining their club. (Normally $16, 20% off with the club card.)
The outlet mall (across the street from the main casino entrance) did not have anything of interest to me other than the California Welcome Center.