I have the RVND 7 it comes with lifetime maps. It will suggest 2 routes, using the parameters you have plugged into the settings. If you want to pick your own routes you can use the GoodSam trip planner and move your routes around with your mouse. It will create a waypoint. Then you can upload the route to the GPS.
Using the Good Sam trip planner when planning trips. This gives me ideas of the routes. On long trips I figure out how many miles I want to go and see what campgrounds are around there. So far it has worked great for us.