There is a dump ($5) at the Chevron station and free water.
I understand there is a RV Park for $75 night - we opted for Free (duhh). New lot is fairly level but can get tight later in the day with more 'campers' and people going to movies and casino - new lots not designed very well for traffic.
Did have EXCELLENT security all day every day. Now a 3 day limit with players card (one day without) and must register - we asked to extend and said 'ok' so don't know that the limit is enforced. take very first entrance you come to for casino complex (not very well marked). New parking area - now on the south side behind movie theatre.