We use Excel spreadsheets for planning day, date, location, campground, mileage, activities etc.
While traveling we use Travel Blog on TravelPod: Because your memories deserve it
to do daily updates for our friends to follow us. It's a great diary when home to remember what you did and when you did it.
Lastly, once home, we take our photos and upload them to to shutterfly as a 3rd back up. Then periodically make digital photo albums and then have them printed for our home library.
This all takes time, but been doing it for many years and it's always a great reference when we repeat trips.