What mapping software does everyone use?
I've gotten into using Google Earth because we had it on the computers but we need signal for that and frequently don't have any. I drop little yellow pins on sites we would like to visit, The yellow pins are how we planned our route from Ohio to Acadia, Maine. I dropped the pins, zoomed out, and there was a trail of yellow pins that we followed. We didn't get to hit them all, but we caught a lot of them. I'll be dropping pins for all the California suggestions and we'll see if the route becomes obvious. I can also then get directions from one pin to another and get an idea of mileage and drive time (right click a pin and select "directions from here", do the same for the pin you want "directions to here").
After we've visited a spot, I go back and either change the yellow pins if we already had it marked or drop a new pin for places we hadn't tagged yet: green tents where we've camped, food signs for good restaurants, blue stars for civil war stuff, little houses for places we've toured, etc. They have lots of little icons and you can add your own. I put brief info into the description field and the dates we were there. NOTE: if you go this route, consider leaving the pin name blank as it clutters up your map. I know Google Earth does a lot more but this is as far as I've gotten with it.
So does anyone have a better solution?