You didn't state your planned route but if you're getting tired by the time you hit Michigan, the Upper Peninsula and the lower, northern part will be beautiful. If you can make it to Sleeping Bear Dunes National Lakeshore around Traverse City, Michigan, it is breathtaking beginning Oct 1.
Keep in mind also that the colors and leaf drop depends on the weather. Sometimes those leaves drop very fast.
I don't know if you'll both be driving but if you're getting tired, slow the pace and don't try to cover so much territory. You'll be seeing fall colors wherever you go. Also, I wouldn't recommend making lots of reservations. Just take your time and enjoy.
Have fun on your trip...and 77 is not old. :)
