Unfortunately, I can't help with the route, but I can give you some advice about the Saco River Camp. We stayed there 3 years ago and when I reserved I thought it would be nice to have a site right beside the Saco River. WRONG! It was nice until it rained, and then it was a sea of mud! There are some lovely sites a bit back from the river - grassy, shady, and manageable during inclement weather. There's lots of traffic and wall to wall commercialism above the campground, but once in the campground it's relatively quiet and very nice. Mt. Washington is about an hour's drive away - a must if you are in the area, but take the train - driving up and down is terrifying unless you have a very small car. Travel safely.
