I like the idea of creating a route for each day. That would make things easier.
I use BaseCamp and it has a big learning curve. What I did was under view drop down I selected Toolbars and selected to display all of the toolbars. I would than select each tool and see what I could do with it.
You create a route from waypoints. You first create a starting waypoint then a ending waypoint. You can also have waypoints in between the starting and ending if you want. With waypoints listed on the left side of the map hold the Ctrl Key down, Left Click on the waypoints in the order of the trip highlighting them. Starting to ending and any in between. Once all are highlighted Right Click on one of the highlighted waypoints and select create a route. My starting waypoint is most time my home and the ending is the campground I plan on staying. The in between is most time are a place to eat, fuel up or a rest break.
When modifying a route you can add waypoints or use the tool Insert. to change the route. It allows you to add points to the route faster than making a waypoint. All you do is select a route than go to the place you want to insert a point. The route will recalculate by itself. You can add as many points as you like. This is one tool that you have to play with to get it to do what you want.