My husband and I are hiring a car from Boston on 8th August, thinking of travelling via the coast up to Portland, then White Mountain. Hoping to see some covered bridges through Vermont, but realise we will be too early for fall leaf changes. Then on to Niagara, where we had considered dropping the car off in Buffalo and flying to Chicago for a week (flying or Amtrak to New York). We don't need to be in New York until 22nd August but don't want to spend the whole time driving but take some time to visit some interesting places. We are from Sydney, Australia and are both enjoy touring and used to long drives. Instead of dropping the car in Buffalo is it feasible to drive to Chicago via Detroit or can anyone suggest a better route.