Just so you can orient yourselves, the mountains are to the NORTH out there.
And Foothill Blvd. is a main drag that runs E-W. If you go west on Foothill to Lone Hill, take that south, you’ll find a WalMart on the east side of Lone Hill, and a nice fast-food Mexican restaurant called Cafe Rio in the same shopping center. If you want to experience small-town ambiance, check out “the Village” in Claremont. Walter’s restaurant is great, and there’s a super ice cream shop also called Burt & Rocky’s. They make their ice cream on site.
If you need anything RV-related there’s a place in Irwindale called Benlo. They’re probably one of the best repair shops in the area — very fair with tremendous integrity.
Enjoy your time in the east San Gabriel Valley. It’s nice out there!