Your pictures looked like some of the access roads that lead into some Ontario Conservation Areas we've been to. Either they are true washboard roads that rattle your teeth, or enough deep unavoidable potholes that your van does the "curb roll" non stop all the way along. I guess they figure it's just a conservation area, and we'll just put up with it, so there's no rush to fix them. Wrong!!! (for me, anyway)
I'm sure there are similar access roads into US parks and campgrounds, but in our memory, we haven't driven too many. Even most of the little backwoods rest areas and campgrounds have decent access driveways and roads. The road into Canyon de Chelly is reported to be one exception, but we have yet to drive it.
Actually, some of the worst roads we've encountered in our travels have been in Quebec and NB, but those were bad because we drove them in the summer (construction) season. We hope the Rte 132 construction around the Gaspe has been mostly finished. It is one of the best "tour" drives we've found, very picturesque, usually not too crowded, and low speed. Lots of scenic pull outs and rest areas. It's fairly well serviced for the entire route in the many small cities, towns, and villages.
Another plus is the climate is usually cooler in the dog days of summer. We've done it thrice for an average trip length of 2 weeks, and only found the heat and humidity was bad for sleeping once or twice.