Leaving tomorrow for Michigan!
The donations so far are more than enough to cover our tracts (which turned out to be $942), as well as all of our expenses while we're in Michigan (so there's no need to contribute any more funds to the other Chip In). The only expense we don't have covered yet is the rental car. Some of you have said you'd like to chip in, so here goes!
***UPDATE*** Thanks everyone! The car's covered.