We stayed at the Oneida Casino in Green Bay for one night. When we arrived all the spots with electric hookups were taken so we drove on through to the parking lot where some trucks were parked. One of the security people on a bicycle showed us where we could park. After a little while we checked again on the parking with the electricity. Someone had just left so we left our car in the space and came back to get the motorhome.

There are 9 spots, all parallel parking along the road behind the casino, and there is no charge to stay there. As you can see from the attached photo each spot is large enough to park a 40' motorhome and its toad. 

We ate at their buffet and were pleasantly surprised at the variety and quality. The next morning as we were preparing to leave, another rig was waiting in the wings to pull into our spot. Since there are hardly any campgrounds in the Green Bay area, this casino parking seems to be very popular.

Additional reports follow photos below... 

Photo from Chris and Gary D., RV parking with electric free - click for larger view

Photo from Casino Camper, parking area for trucks and RVs

-Casino Camper Report, September 2009

We were passing through Green Bay and needed to stop for a night.  I didn't know of a casino in the area, so figured we'd hit a Walmart and went to our favorite reference for Wally World parking; www.overnightrvparking.com.  There's a small fee but it's worth every penny.  They also list some casinos and I saw Oneida Casino in Green Bay with Free overnight RV parking and some sites including electric hookups, also free.  I programmed the GPS and navigated us to Oneida! 

The electric sites are parallel parking along the entry road, looks like Meas Dr. on Google maps.  All the electric sites were taken so we parked with the 18 wheelers and busses in the Southwest corner of the parking lot.

There are two casinos here and a shuttle will pick you up from the parking lot to take you to the newer one.  It's attractive and nicer than we expected.  Several dining options looked good but we had already eaten.  Chris played some video poker and I hit the blackjack table.

Nice place to stop, we would return.   Photo below is of the truck and bus parking.  The brick building is the old casino.