That's my next step.
I spoke with my farmer friend earlier and he might be able to find me some "free" sand to help lighten it up. He said that I definitely need something heavy duty to break it up this time due to the soil (really heavy black dirt), but that I should probably be able to maintain it with a harrow/rake or my garden rototiller for the rest of the year. But I didn't even think about asking him to disk it for me.
I know it's going to be slick when wet, but it's already really slick so honestly I don't think I can get any worse. When I was a kid we would use the paddock as a slip n slide after a rain because it was better than greased plastic, LOL! Basically when it's wet I ride on the road otherwise everything is like ice. The soil is great because it's so fertile, but once in awhile I really wish for some nice sandy stuff.