Is overnight parking allowed

You can probably get away with it for a night or two, after all, it is the Hi desert, Inland Empire country.

Park on the dirt and no one will bother you. I have many times and no one has bothered me.

There is a gravel lot next to the store, and if you have a truck and trailer with a load, you can park there overnight.

I have heard you can but don't take it as a sure thing.

Wouldn't know but common sense tells me no, not with out any permission. I myself have left a broken down car if mine in a no over night parking with a note on the window explaining and that it will be picked up the next day. Theres also security that drives around ,,,,,so maybe your want to ask them. For future references when you ask through here questions about a store to get info, your asking people who have visited the store and reviewed the location and may not know all the details pertaining to the stores items, policies or hours.

I don't think so. They have security guard that patrols the area and security cameras in the parking lot.