A few notes about Michigan chasing that I've said often and never written down.
Your worst enemy in Michigan during a chase is terrain, be it hills, trees or a combination of the above. Like said previously, below I-96 is generally decent for chasing in respect to trees and hills. The Flint-Saginaw-Mount Pleasant-Lansing Quadrangle is also fairly reasonable. If your chase carries you into heavily wooded areas, you need to either bail out or exercise EXTREME caution (this is from experience, had an EF2 tornado drop behind my car while chasing north of Fenton on June 8, 2003... First chase and almost my last because I wasn't able to get a read on the storm mostly due to terrain and the next thing I'll discuss).
Your second worst enemy in Michigan is the storm you're chasing getting rain-wrapped, and this is going to happen frequently. This is going to rapidly degrade your visibility and if you are close in you are going to end up in extreme danger because you're highly unlikely to see it coming.
The most common problem, however, is setup (as discussed earlier). When a lee-side low pressure system forms as a shortwave approaches the Plains, it is in the absolutely best spot to develop a dryline as well as fantastic moisture return from the Gulf of Mexico. Once that system slides northeast to give Michigan a chance, there is no dryline, no favorable wind profile and the lakes will play havoc with your lower-level thermodynamics. Michigan really isn't the best place meteorologically to get tornadoes, but as L.B. stated: We're overdue for a violent tornado.
Another F5 to add to the list is the 1896 Ortonville-Oakwood-Thomas tornado as per Grazulis/The Tornado Project.