Visited Harrahs at Rincon Valley. California. No problem staying overnight. They welcome the overnighters - just have to camp in the paved parking lot that the buses use but they are gone at night - just coming and going all day. Only one truck was there during the 24 hours we were visiting. Quiet at night.
First time visitors receive $20.00 in free slot play and $20.00 food coupon (per person)-just sign up for a Rewards card. We had Harrah Rewards cards from Reno but they still gave us the money & food coupons because it was our first visit to this particular casino.
Had GREAT food in the Cafe - large portions - had enough food for 2 meals each. Have a Poker room and table games. Happy Hour in the Sports Bar had good prices - just did not have any food the night we visited.