I keep a google map of all the places we've visited (camper or not):
https://www.google.com/maps/@36.8018...5yq1001k?hl=en
I don't put any notes in there, just the places.
We also have a binder in the RV that we stuff all the campground maps/brochures in (the maps they give you to find your site). That has been handy when camping and a fellow camper asks about a campground (although the binder is a good 6" thick now LOL).
I also keep all our pics organized in a directory structure at home (and more recent ones/favorite ones on my laptop):
YYYY/YYYY-MM-DD-EventName
Usually revisiting the pics is enough to remind me if we liked the place or not, etc.