From Isle corporate PR, November 2010: RV parking is not available at the casino; however RVs are welcome to park nearby at Miners Mesa and take a free shuttle to the casino.
If you plan to stay in blackhawk or central city plan to pay. the city is not rv friendly and has a ban on overnight rv parking. I dont gamble, eat buffets, or spend any money in a casino town that is not rv friendly. lets face it there are too many that are rv friendly to bother. i parked in evergreen at the walmart, very rv friendly and plenty of spaces. and i spend money at the walmart when i can park for free.