I've been around the N Indian Canyon Dr area on my way to Glamis and if the Pilot is full of trucks we're screwed... I had a hard time parking my toyhauler because there were so many trucks..
Cabazon (Morongo Casino) has a ton of parking, Coco's Bakery, A&W, Panda Express, Hadley Fruit Orchards, Fatburger, LA Italian Kitchen, Nathan's hot dogs and ice cream at Haagen Daz (and that's just the food court). Food at the outlets includes: Ruby's Diner and several others..
The Morongo Travel Center has
32 pumps that all have 87, 89 & 91 octane..