Rick......go for it. That bridge is amazing, an engineering marvel. And the others are correct. Safety is the word of the day. If the winds/weather are threatening they will not allow high profile vehicles to cross. You will know well in advance so don't worry about it. But when the weather is good the ride across "Big Mac" is great.
BTW, while you're there, if you have time, check out the Great Lakes Shipwreck Museum (
http://www.shipwreckmuseum.com/ ). You will not be disappointed.