DTW is bad bad bad for motorcycling if you like curvy roads. If you love free-way riding, then you'll be at home. There are lakes around that you can do all the above on. Snowmobiling you'll still have to go north to get to the good stuff. Most of the locals go up to the U.P. for the outdoor stuff, but even anything north of Flint will work. Skies the limit with outdoor activities though in northern MI. There's also a variety of Metro-Parks in the area that you can bicycle/run/rollerblade etc. on in the trails. I lived up there a year and a half, so I know a little about the area. If you do go up there, depending on what type of bike you ride, I know some people you could hook up with.(sportbike group, not a squid-fest I assure you)