I use an older version of Delorme Street Atlas 2015 and Topo Maps. To bad that Garmin bought DeLorme a few years ago and dumped their best products like the trip planning software. If you can find the software available some where I recommend you buy it, I have found it works great on my laptop for both trip planning and navigation. You will also need the GPS puck or antenna to place on the two vehicle dash board (it plugs into to a USB port on the laptop).
In my discussions with other DeLorme users, they had not found any other product that is available today that does anything like this software. We are still looking!