We don't care to base too much of our trips on having access to online services, as we can't always count on being able to connect to cell towers.
We use several very detailed state-by-state atlas books and our satellite based Garmin navigator unit. Our Garmin unit has a large internal memory, so we keep hundreds of thousands of Point of Interest (POI) places stored right in it. Points of Interest are in databases created by, and maintained by, actual users. We store POI databases on such places as U.S. bodies of water, Walmart Superstores, National Parks, private parks, gas stations, dump stations, medical facilities, Camping World locations, fast food restaurants, State Parks, propane filling stations, etc.. These POI databases are updated constantly by navigator users.
I agree with the poster above who stated that Streets and Trips was a great computer based trip planner. I wish it was still available ... I think this was Microsoft software(?).