If you loved Brown Deer and Dretzka, you will love Root River. (Dretzka was my favorite when i lived there, my review says why)
UW Parkside is worth the drive, and it actually has 2 courses, the lovely technical 18-holes on campus, and the 21 hole "Orchid" course thats more rough-cut, longer prairie course with some par 4s.
If you are willing to drive a little farther, Zobel Park in Green Lake is excellent, as is Bird's Ruins in Marshall (just east of Madison, which has several nice courses, with more terrain than Milwaukee)
Have NOT played Red or Grey Fox, but I've heard good things. I have reviewed a bunch of WI (and NE-IL and NW-IN) courses if you want to go further away from Milwaukee. Hope you realzie how lucky you are, you are surrounded LOOOOOOOTS of good options.