Stayed at the Hollywood Joliet RV park in mid October. We travel with our two dogs and the park had plenty of places for them to run without bothering other RVers. No full hook ups, electric and water only. Cost with casino players card was $38 (a little high considering only water and electric). Staff at check in was friendly and welcoming. Dump is by exit so convenient if only staying for a few days but quite a ways from the rv park. The bathroom/showers were okay. Liked the layout of the park. Back in sites seemed like they were spaced farther apart then the pull thru's. All in all would definitely stay there again.
Park is nothing more than the remains of the workers camp left over from construction of the hotel and casino. There are no full hookups, no cable and no WiFi. There's a huge parking lot that trucks are allowed to overnight in but NOT RV"s. Instead we are relegated to this so-called Resort. They make a big deal of the free breakfast in the nearby hotel but that's no value unless you're feeding a scout troupe. And for this they get an excessive $39 ($10 more if you want a pull thru). About twice what it's worth. I couldn't believe this was the same place the others rated.
Stayed here in May 2012. Sites are spacious and have water and electric. There is an attendant in the office, also one in the adjacent building for checkout. Dump station conveniently placed. Rate is still $27 a night. If you join the Players Club, you get a coupon book with coupons for the buffet, etc. Not many places to stay in the Chicago area and this is a very good one.