I've not found an all inclusive thing to use for our trip planning, but I do take in the ratings/ideas from all over...
the Good Sam rv travel guide book,
good sam trip planner (http://www.goodsamclub.com/travel/
what ever and where ever I can find info, even with a google search...
But for routing ideas, I typically use google maps and focus in on the satelite and street view to see what it looked like when the sat passed over and the google camera car passed by -
it's the best I can do other than getting on the forums and asking "Have you been here ? "
good thing about google maps is MOST of the time, it's copy write 2013 or 2014 so pretty recent stuff... As an example here is one I worked up for our trip to savannah in a few months: Itinerary
We've even been known to take the goggle route and follow it along in street view to make a virtual drive to be sure it is not a one lane road
I do appreciate ratings from others,
but until we find out their taste and expectations are similar to ours,
it can lead to surprises... good luck and go find out if you like it!