MS S&T, MapSource, Garmin BaseCamp, or MapQuest

We do the planning on Streets & Trips,bigger screens and can double check campgrounds and other POI on the web. Once satisfied with route transfer to the Garmin in sections generally one or two days at time. Have to be careful, however on our last trip there were at least 4 POI or campgrounds located in the wrong place, causing much hand wringing. The Garmin was accurate for 3 of the 4 places, but only if the actual address was inputted, not the name of the place.