Re: Too late to requeen in UP of Michigan?
I would try to find a queen from someone in the south and get one in the mail right away. When she arrives make sure you cut out all the queen cells. Do a thorough frame by frame inspection and be certain you got all of them, and also look closely to make sure there is not still a failing queen in there somewhere. You don't want her to kill the new queen. If you find any eggs or very young larvae she is still in there.
It sounds like the colony is ready for winter and it would be a shame to let it go. Buying a queen right now is a lot cheaper than a spring package next year.
To everything there is a season....