Holiday Rambler Aluma-Lite HRC XL (Class C, Ford Econoline based), the official car (RV) of?

Spotted in a Walmart parking lot. This one is based on the 1975-91 Ford Econoline, more specifically 1983 to 1991 (exact year unknown due to the lack of substantial changes throughout the ‘75-‘91 Econoline’s model run) based on the grille.