I really like using Microsoft's Streets & Trips. I set up my prospective route for ideas as to distance and days traveled and then go in and make changes as my route and destinations change. You can save the trip and move it from computer to computer via a flash drive.
The Discovery Owners' Club has created an overlay file for Streets and Trips that helps find RV-friendly locations - http://www.discoveryowners.com/cginfo.htm. I sometimes save the file with 2 different names - my original one and the one I change from day to day and then compare them to see how my actual trip differed from my original plan.
You can add all kinds of details as name of Campground or attraction, phone number, address, etc.
Hope this helps.