Marlborough is not that bad. Some short steep hills, but it's more suburban. Lancaster has some longer more moderate hills, with a few steep ones thrown in. The pavement is bad there!
I think you will be OK if you can get to PA and train for some of it; the terrain is similar. Remember, your most important gear is the lowest one. If you send the specific route, I could probably tell you more in detail, as I have ridden in most of those places.