a good place to stop in Illinois, is the TIN CUP, on I 74, just a bit Northwest of I 57, in Mahatma. We stayed there, and wi fi is available if you park close to the office. Last week we stayed at the Country Roads rv park, in Lake Delton, Wi. Near all the things to do in the Dels. It caters to mainly adults.
If you want to go all the way to Bloomington, there is a nice county park on exit 8 on I39. Lake Comlara. or Evergreen lake, forgot which it is.