Camping at Wal-mart

We fled the fierce rainstorms of San Diego this morning and drove over the mountains to El Centro hoping for some drier weather.  It’s wet here too, but less wet. The best we could do for a campsite in an RV park was 25 dollars with no hook-ups, which didn’t make a lot of sense to us, as we knew we could park at Wal-Mart for free.  So we drove on to Wal-Mart and are parked in their parking lot for the night.  So far we have made three or four trips into the store and have spend about 50 bucks.  I’m not sure you can camp at Wal-Mart for free.