We headed direct to Fond du Lac, Wisconsin, and flew a west-northwest heading of about 290 degrees at 2,500 feet because Steve liked to stay low and enjoy the view. This was in direct opposition to my training — that there is safety in altitude — but Steve blew me off when I mentioned a higher altitude. Steve also thought my idea of flight following was a bad one. He was starting to make me feel like a safety freak. The first half of our flight was uneventful. We did encounter occasional rain showers, but ceilings were somewhere above us (not hard to do at 1,500 feet agl). After about an hour we started a climb to gain some altitude for the crossing. (So Steve’s not totally crazy!) We reached the shoreline of Lake Michigan, and looking out over the lake, all we could see was haze and clouds. The forward visibility was nil and there was no horizon to be seen — everything was a gray blob. Steve was not concerned about this, but without an IFR flight plan I insisted we turn and follow the shore of Lake Michigan around to Chicago. Steve reluctantly agreed, and as we flew south along the shoreline, storms were popping up everywhere. We got some weather information about a storm heading our way from Flight Watch, so we stopped at Andrews University (C20) to wait for the approaching thunderstorm to pass. After about an hour we took off and continued our journey. The rest of the trip was met with rain showers and thunderstorms, but fortunately the ceilings were high enough and we could continue VFR. We spotted many heavy rain showers as we made our way (many thanks to the great controllers throughout Wisconsin who helped us pick our way through). Eventually we made it to Fond du Lac. It was about 11 a.m. by now, and we parked the airplane, filled out our fuel card and attached it to the prop. We hopped on the shuttle bus and headed to the fun!